An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 20 carbons and 0 double bonds and is 2-hydroxylated.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl substituents at positions 1 and 2 are specified as heptadecanoyl and (9Z,12Z)-octadecadienoyl respectively


An organic cation that is the conjugate acid of demethyllactenocin, obtained by protonation of the tertiary amino group; major species at pH 7.3.


vinca alkaloid cation

Any cation arising from protonation of at least one of the amino functions in a vinca alkaloid.


An alkyl,acyl-sn-glycero-3-phosphocholine having an acyl group at the 1 position and a (Z)-alk-1-enyl substituent at the 2-position.


tryptaminium

An  ammonium ion that is the conjugate acid of tryptamine arising from protonation of the primary amino group; major species at pH 7.3.


The conjugate acid of morphinone arising from protonation of the tertiary amino group; major species at pH 7.3.


An ammonium ion that is the conjugate acid of dopamine; major species at pH 7.3.


monoalkylglycerophosphocholine

A glycerophosphocholine that is glycero-3-phosphocholine bearing a single alkyl substituent at an unspecified position (sn-1, sn-2, or sn-3).


An organic cation obtained by protonation of the tertiary amino function of N-allyl-1-phenyl-2,3,4,5-tetrahydro-3-benzazepine-7,8-diol.


Conjugate acid of 6-(alpha-D-glucosaminyl)-1D-myo-inositol.


phosphatidylcholine 43:6

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two phosphatidyl acyl groups contain a total of 43 carbons and 6 double bonds.


A 1-(Z)-alk-1-enyl-2-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups are specified as (1Z)-hexadecenyl  and (9Z,12Z)-octadecadienoyl respectively.


A vinca alkaloid cation resulting from the protonation of the two tertiary amino groups of vincristine. Major species at pH 7.3.


The conjugate acid of N-acetyl-beta-D-glucosaminyl-(1->4)-D-glucosamine.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 23 carbons and 2 double bonds.


phosphatidylcholine 40:10

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 40 carbons and 10 double bonds.


An ammonium ion that is the conjugate acid of propylamine.


The ammonium betaine formed from 1-acyl-2-oleoyl-sn-glycero-3-phosphocholine by deprotonation of the phosphate OH group.


phosphatidylcholine O-38:0

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 38 carbons and 0 double bonds.


A sphingomyelin d18:1 in which the ceramide N-acyl group is specified as dodecanoyl (lauroyl).


An organic cation obtained by protonation of the secondary amino function of rucaparib.


An organic cation that is the conjugate acid of pseudooxynicotine, obtained by protonation of the secondary amino group; major species at pH 7.3.


phosphatidylcholine 34:5

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 34 carbons in total with 5 double bonds.


phosphatidylcholine (18:1/18:2)

A phosphatidylcholine 36:3 in which the fatty acyl groups at positions 1 and 2 are specified as C18:1 and C18:2 respectively.


phosphatidylcholine 30:6

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 30 carbons in total with 6 double bonds.


sphingomyelin d18:1/25:2

A sphingomyelin d18:1 in which the total number of carbons in the fatty acyl group is 25 with 2 double bonds.


A phosphatidylcholine O-30:0 in which the alkyl and acyl groups at position 1 and 2 are tetradecyl and hexadecanoyl respectively.


An organic cation resulting from the protonation of the amino group of (S)-prasugrel.


phosphatidylcholine (O-16:0/18:1)

A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the acyl group contains 18 carbons and 1 double bond while the alkyl group contains 16 carbons and is fully saturated.


The conjugate acid of codeine arising from protonation of the tertiary amino group; major species at pH 7.3.


erythromycin B(1+)

An erythromycin cation that is the conjugate acid of erythromycin B, arising from protonation of the tertiary amino group on the 3,4,6-trideoxy-3-(dimethylamino)-beta-D-xylo-hexopyranosyl residue; major species at pH 7.3.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 18 carbons and 1 double bond.


A phosphatidylcholine O-34:0 in which the alkyl and acyl groups at positions 1 and 2 are hexadecyl and octadecanoyl respectively.


An organic cation obtained by protonation of the secondary amino function of PD-153035.


A sphingomyelin 36:3 in which the fatty acyl and sphingoid portions are specified as oleoyl and (4E,14Z)-sphingadienine respectively.


phosphatidylcholine 34:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 34 carbons in total with 1 double bond.


herquline C(1+)

A secondary ammonium ion that is the conjugate acid of herquline C resulting from the protonation of the secondary amino group; Major species at pH 7.3.


lysophosphatidylcholine 15:1

A lysophosphatidylcholine in which the remaining acyl group (position unspecified) contains 15 carbons and 1 double bond.


A phosphatidylcholine 14:0 in which both acyl groups are specified as heptanoyl.


phosphatidylcholine 40:7

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 40 carbons in total with 7 double bonds.


A sphingomyelin in which the sphingoid component is specified as 15-methylhexadecasphinganine.


sphingomyelin 42:4

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 42 with 4 double bonds.


A phosphatidylcholine O-40:0 in which the acyl groups specified at positions 1 and 2 are octadecyl and docosanoyl respectively.


An alpha-amino-acid cation that is the conjugate acid of 2-aminooctanoic acid, arising from protonation of the amino group.


A quaternary ammonium ion obtained by the protonation of the carboxy function of N(alpha),N(alpha),N(alpha)-trimethyl-L-histidine.


A primary ammonium ion that is the conjugate acid of 5-methoxytryptamine obtained by the protonation of the primary amino group. Major microspecies at pH 7.3.


RS 39604(1+)

An organic cation obtained by protonation of RS 39604.


An sn-monothiophosphatidylcholine in which the acyl substituents at O-1 and S-2 are both palmitoyl (hexadecanoyl); a chromogenic  phospholipase A2 substrate that contains a palmitoyl thioester at the sn-2 position of the glycerol backbone.


sphingomyelin 42:3

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 42 with 3 double bonds.


Major microspecies at pH 7.3


phosphatidylcholine (P-16:0/18:1)

A phosphatidylcholine P-34:1 in which the 1-alk-1-enyl group contains 16 carbons and no additional double bonds while the 2-acyl group contains 18 carbons and 1 double bond.


A 1-alkyl-sn-glycero-3-phosphocholine in which the alkyl group is specified as octadecyl


aclacinomycin T(1+)

A quaternary ammonium ion resulting from the protonation of the amino group of aclacinomycin T. The major species at pH 7.3.


phosphatidylcholine 32:4

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 32 carbons in total with 4 double bonds.


The conjugate acid of 7-O-acetylsalutaridinol arising from protonation of the tertiary amino function.


An ammonium ion derivative that is the conjugate acid of (S)-methcathinone obtained from the protonation of the amino group. It is the major species at pH 7.3.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 26 carbons and 0 double bonds.


Conjugate acid of L-2,4-diaminobutyric acid.


histaminium

An ammonium ion that is the conjugate acid of histamine protonated on the side-chain nitrogen.


pyrrolidinium ion

The ion formed by protonating nitrogen in pyrrolidine.


A aporphine alkaloid that is the quaternary ammonium ion obtained by methylation of the tertiary amino group of (S)-glaucine.


phosphatidylcholine 33:3

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and contain a total of 33 carbons and 3 double bonds.


chanoclavine-I aldehyde(1+)

An indole alkaloid cation that is the conjugate acid of chanoclavine-I aldehyde obtained by protonation of the secondary amino group. Major species at pH 7.3


An ammonium ion resulting from the protonation of two most basic nitrogens of pramipexole.


Trication of sym-homospermidine arising from protonation of all three amino groups; major species at pH 7.3.


A phosphosphingolipid consisting of sphinganine having a phosphocholine group attached to its primary hydroxyl group.


An amino-acid cation comprising fructosyllysine having a deprotonated carboxy group and both amino groups protonated; major species at pH 7.3.


A sphingomyelin in which the ceramide N-acyl group is specified as hexanoyl.


An organic cation obtained by protonation of the secondary amino group of 8-(6-methoxypyridin-3-yl)-3-methyl-1-[4-(piperazin-1-yl)-3-(trifluoromethyl)phenyl]-1,3-dihydro-2H-imidazo[4,5-c]quinolin-2-one.


An alkyl,acyl-sn-glycero-3-phosphocholine in which unspecified alkyl and acyl groups are located at positions 1 and 2 respectively.


A phosphatidylcholine 34:4 in which the acyl groups specified at positions 1 and 2 are hexadecanoyl and (6Z,9Z,12Z,15Z)-octadecatetraenoyl respectively.


An organic cation obtained by protonation of the primary amino group of 7-(3-aminopyrrolidin-1-yl)-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid.


N-acetylputrescinium

An ammonium ion that is the conjugate acid of N-acetylputrescine; major species at pH 7.3.


Conjugate acid of (R)-piperazine-2-carboxamide arising from selective protonation at the 4-position.


A organic cation obtained by protonation of the two tertiary amino functions of vanoxerine


An organic cation obtained by protonation of the amino group of 1-hexadecyl-2-amino-2-deoxy-sn-glycerol; major species at pH 7.3.


lysophosphatidylcholine 28:0

A lysophosphatidylcholine in which the remaining acyl group is specified as octacosanoyl (montanoyl). If R1 is the acyl group and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is the acyl group then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


The conjugate acid of D-ornithine having an anionic carboxy group and both amino groups protonated; major species at pH 7.3.


A secondary ammonium ion resulting from the protonation of the secondary amino group of tamsulosin. The major species at pH 7.3.


A phosphatidylcholine 36:6 in which the acyl groups specified at positions 1 and 2 is (9Z,12Z,15Z)-octadecatrienoyl.


A lysophosphatidylcholine 20:2 in which the acyl group is specified as (11Z,14Z)-icosadienoyl and is located at position 1.


phosphatidylcholine 44:3

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 44 carbons in total with 3 double bonds.


Conjugate acid of (S)-piperazine-2-carboxamide arising from selective protonation at the 4-position.


An organic cation obtained by protonation of the secondary amino function of (S,R,R,R)-nebivolol.


kanamycin B(5+)

An organic cation that is the pentacation of kanamycin B, obtained by protonation of the primary amino groups.


An ammonium ion derivative resulting from the protonation of the two tertiary amino groups of tilorone.


A phosphatidylcholine 36:4 in which the acyl groups at positions 1 and 2 are octadecadienoyl with double bonds at unspecified positions.


methyl green(2+)

An iminium ion that forms the cationic portion of the histological dye 'methyl green'.


A lysophosphatidylcholine 24:0 in which the acyl group is specified as tetracosanoyl and is located at position 1.


A phosphatidylcholine 36:3 in which the acyl groups specified at positions 1 and 2 are (9Z)-octadecenoyl and (6Z,9Z)-octadecadienoyl respectively.


cyclanoline

A charged berberine alkaloid obtained by N-methylation of (S)-scoulerine.


sphingomyelin 40:4

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 40 with 4 double bonds.


An organic cation obtained by protonation of the secondary amino function of pseudoephedrine.


An ammonium ion that is the conjugate acid of tigecycline; major species at pH 7.3.


A dicarboxylic acid monoamide of glutaric acid containing benzene and piperidinium moieties; a transition state analogue hapten used to elicit catalytic antibodies 5C8 and 14B9.


Conjugate acid of 13-(2-methylcrotonoyloxy)lupanine.


phosphatidylcholine 42:9

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 42 carbons in total with 9 double bonds.


carcininium

A primary ammonium ion obtained by protonation of the primary amino group of  carcinine; major species at pH 7.3.


phosphatidylcholine 18:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 18 carbons and 2 double bonds.


Conjugate acid of 13-hydroxylupanine.


D-tyrosinium

An optically active form of tyrosinium having D-configuration.


A 1,2-diacyl-sn-glycero-3-phosphocholine where the acyl groups at positions 1 and 2 are hexadecanoyl and heptadecanoyl respectively.


butyrylthiocholine

A quaternary ammonium ion obtained by the formal condensation of the carboxy group of butyric acid with the thiol group of thiocholine. It is used as a reagent for determination of butyrylcholinesterase activity.


An ammonium ion resulting from the protonation of the pyrrolidine nitrogen of tripoloidine. It is the major species at pH 7.3.


An ammonium ion that is the conjugate acid of 2-amino-2-deoxy-D-glucopyranose.


A 1-acyl-2-alkyl-sn-glycero-3-phosphocholine in which the 2-alkyl moiety can be any alk-1-enyl group.


A phosphatidylcholine 33:1 in which the 1- and 2-acyl groups are specified as pentadecanoyl and oleoyl respectively.


phosphatidylcholine (15:0/20:4)

A phosphatidylcholine 35:4 in which the fatty acyl groups at positions 1 and 2 are specified as C15:0 and C20:4 respectively.


huprine 19(2+)

A primary ammonium ion resulting from the protonation of the imine nitrogen and primary amine; Major species at pH 7.3.


leucinium

An alpha-amino-acid cation that is the conjugate acid of leucine, arising from protonation of the amino group.


An alpha-amino-acid cation that is the conjugate acid of lysine, having two cationic amino groups and an anionic carboxy group.


A phosphatidylcholine 38:5 in which one acyl group has 18 carbons and 1 double bond while the other has 20 carbons and 4 double bonds (position not specified).


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 17 carbons and 0 double bonds.


A phosphatidylcholine O-38:5 in which the alkenyl group at position 1 is (9Z)-octadecenyl and the acyl group at position 2 is (5Z,8Z,11Z,14Z)-eicosatetraenoyl respectively.


phosphatidylcholine 34:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 34 carbons in total with 2 double bonds.


Se-methylselenomethionine

A selenoamino acid that is selenomethionine in which the selanyl group has been methylated.


betaine aldehyde hydrate

A quaternary ammonium ion that is the hydrate of betaine aldehyde.


Any member of the class of lysophosphatidylcholines which has a free hydroxy group at the 2-position of the glycerol moiety.


phosphatidylcholine 30:4

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 30 carbons in total with 4 double bonds.


phosphatidylcholine O-30:0

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 30 carbons and 0 double bond.


phosphatidylcholine (15:1/18:1)

A phosphatidylcholine 33:2 in which the fatty acyl groups at positions 1 and 2 are specified as C15:1 and C18:1 respectively.


phosphatidylcholine (O-16:1/18:2)

A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the acyl group contains 18 carbons and 2 double bonds while the alkyl group contains 16 carbons and 1 double bond.


sphingomyelin 34:2

A sphingomyelin in which the total number of carbons in the sphingoid base (R1) and fatty acyl (R2) groups is 34 with 2 double bonds.


An ammonium ion that is obtained by protonation of the pyrrolidine nitrogen of eletriptan.


A cationic sphingoid that is the conjugate acid of 15-methylhexadecasphinganine, obtained by protonation of the amino group; major species at pH 7.3.


scopolamine butylbromide

A carboxylic ester resulting from the formal condensation of the carboxy group of (2S)-3-hydroxy-2-phenylpropanoic acid with the hydroxy group of (2R,4S,5S,7s)-9-butyl-7-hydroxy-9-methyl-3-oxa-9-azoniatricyclo[3.3.1.0(2,4)]nonane.


A phosphatidylcholine 36:1 in which one acyl group has 18 carbons and is fully saturated while the other has 18 carbons and 1 double bond (position not specified).


A phosphatidylcholine 42:0 in which the acyl groups specified at positions 1 and 2 are eicosanoyl and docosanoyl respectively.


octyltrimethylammonium ion

A quarternary ammonium cation having one octyl and three methyl substituents around the central nitrogen.


A sphingomyelin 42:3 obtained by formal condensation of the carboxy group of any tetracosenoic acid with the amino group of any sphingadienine-1-phosphocholine.


lysophosphatidylcholine 18:4

A lysophosphatidylcholine in which the acyl group (position not specified) contains 18 carbons and 4 double bonds.


A quaternary ammonium salt obtained by formal methylation of the tertiary amino function of 4-diphenylacetoxy-N-methylpiperidine.


A phosphatidylcholine 40:1 in which the acyl groups specified at positions 1 and 2 are eicosanoyl and (11Z)-eicosenoyl respectively.


lysophosphatidylcholine 22:1

A lysophosphatidylcholine in which the remaining acyl group contains 22 carbons and 1 double bond. If R1 is the acyl group and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is the acyl group then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


An ammonium ion resulting from the protonation of the amino group of (S)-2-aminopropan-1-ol. The major species at pH 7.3 according to Marvin ver. 6.2.0.


phosphatidylcholine (20:4/20:4)

A phosphatidylcholine 40:8 in which the fatty acyl groups at positions 1 and 2 are both specified as C20:4.


An organic cation obtained by protonation of the secondary amino group of norbelladine; major species at pH 7.3.


A phosphatidylcholine 36:0 in which both phosphatidyl acyl groups are specified as stearoyl (octadecanoyl).


Conjugate acid of (2R,4S)-2,4-diaminopentanoic acid.


A phosphatidylcholine 38:4 in which the acyl groups at positions 1 and 2 are octadecanoyl and (8Z,10Z,12Z,14Z)-eicosatetraenoyl respectively.


A phosphatidylcholine 37:4 in which one acyl group has 17 carbons and is fully saturated while the other has 20 carbons and 4 double bonds (position not specified).


Conjugate acid of (7S)-salutaridinol.


Conjugate acid of (+-)-5-[3-(tert-butylamino)-2-hydroxypropoxy]-3,4-dihydronaphthalen-1(2H)-one.


sphingomyelin 36:0

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 36 with 0 double bonds.


An organic cation that is the conjugate acid of L-alaninamide, obtained by protonation of the gamma-amino group.


A 4-(trimethylammonio)but-2-enoic acid with a (E)-configuration at the double bond.


An organic cation obtained by protonation of the amino group of 3-amino-2,3-dideoxy-scyllo-inosose; major species at pH 7.3.


A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine where the 2-O-acyl component is specifed as arachidonoyl.


A  sphingomyelin 34:2 in which the ceramide N-acyl group contains 16 carbons and 1 double bond.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 21 carbons and 0 double bonds.


A 2-ammonio-2-deoxy-D-glucopyranose that has beta- configuration at the anomeric carbon.


phosphatidylcholine (18:0/22:4)

A phosphatidylcholine 40:4 in which the fatty acyl groups at positions 1 and 2 are specified as C18:0 and C22:4 respectively.


An organic cation obtained by protonation of the four free amino groups of amikacin; major species at pH 7.3.


phosphatidylcholine (14:0/16:1)

A phosphatidylcholine 30:1 in which the fatty acyl groups at positions 1 and 2 are specified as C14:0 and C16:1 respectively.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 19 carbons and 2 double bonds.


trimethylphenylammonium

A quaternary ammonium ion obtained by methylation of N,N-dimethylaniline.


lysophosphatidylcholine (0:0/20:3)

A lysophosphatidylcholine 20:3 in which the acyl group is located at position 2.


A primary ammonium ion that is the conjugate acid of arterolane, resulting from the protonation of the primary amino group. Major species at pH 7.3.


A phosphatidylcholine 36:2 in which the acyl groups positions 1 and 2 are specified as octadecanoyl and (9Z,12Z)-octadecadienoyl respectively.


A sphingomyelin in which the sphingoid component is specified as icosasphinganine.


sphingomyelin 36:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 36 with 2 double bonds.


huperzine A(1+)

A primary ammonium ion that is the conjugate acid of huperzine A resulting from the protonation of the primary amino group; major species at pH 7.3.


An N-hydroxydocosadienoylsphingosine-1-phosphocholine in which the N-acyl group is specified as (13Z,16Z)-3-hydroxydocosa-13,16-enoyl.


A quaternary ammonium ion that is (13S,14R)-1-hydroxy-13-O-acetyl-N-methylcanadine which carries a hydroxy group at position 8.


An alpha-amino-acid cation resulting from the transfer of a proton from the carboxy to the amino group of Se-methyl-L-selenomethionine. Major species at pH 7.3


phosphatidylcholine (18:2/22:4)

A phosphatidylcholine 40:6 in which the fatty acyl groups at positions 1 and 2 are specified as C18:2 and C22:4 respectively.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 22 carbons and 0 double bonds and is 2-hydroxylated.


phosphatidylcholine O-13:0

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 13 carbons and no double bonds.


An ammonium ion that is obtained by protonation of both the tertiary amino group and the anilino nitrogen of metoclopramide.


phosphatidylcholine 16:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two phosphatidyl acyl groups contain a total of 16 carbons and 2 double bonds.


phosphatidylcholine 46:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 46 carbons in total with 0 double bonds.


primary methyl ammonium ion

An ammonium ion derivative resulting from the protonation of the nitrogen atom of a primary methyl amino compound. Major species at pH 7.3.


The conjugate acid of 1-benzyl-1,2,3,4-tetrahydroisoquinoline arising from protonation of the amino group; major species at pH 7.3.


phosphatidylcholine 32:5

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 32 carbons in total with 5 double bonds.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 16 carbons and 4 double bonds and is 2-hydroxylated.


Major microspecies at pH 7.3.


Ro 48-8071(1+)

An organic cation obtained by protonation of the tertiary amino group of Ro 48-8071.


lysophosphatidylcholine 15:0

An acyl-sn-glycero-3-phosphocholine in which the acyl group contains fifteen carbons with no double bonds and is attached to the glycero moiety at either position 1 or 2.


Deoxysphingoid base

A cationic sphingoid obtained by the protonation of the amino group of any 1-deoxysphingoid base.


phosphatidylcholine 37:6

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two phosphatidyl acyl groups contain a total of 37 carbons and 6 double bonds.


tyrosinium

An alpha-amino-acid cation that is the conjugate acid of tyrosine, arising from protonation of the amino group.


A phosphatidylcholine 40:1 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (13Z)-docosenoyl respectively.


A lysophosphatidylcholine 16:0 in which a hexadecanoyl (palmitoyl) group is attached to the glycero moiety at position 1.


The dication of N(8)-acetylspermidine.


A cationic sphingoid obtained by the protonation of the amino group of 1-deoxymethylsphinganine.


secondary aliphatic ammonium ion

A secondary aliphatic amine protonated on nitrogen.


A phosphatidylcholine 40:5 in which the acyl groups at C-1 and C-2 are octadecanoyl and (6Z,9Z,12Z,15Z,18Z)-docosapentaenoyl respectively.


beta-ammoniopropionitrile

A primary ammonium ion obtained by protonation of the amino function of beta-aminopropionitrile.


lysophosphatidylcholine 18:0

A lysophosphatidylcholine in which the acyl group has a fully saturated C18 chain and is attached to the glycero moiety at either position 1 or 2.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 23 carbons and 0 double bonds.


A  1-O-(alk-1-enyl)-2-O-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups are specified as (1Z)-hexadecenyl and arachidonoyl respectively.


6-(O-phosphocholine)oxyhexanoic acid

A phosphocholine linked to 6-hydroxyhexanoic acid via a phosphodiester linkage.


Conjugate acid of 7-aminomethyl-7-deazaguanine.


A 2-acyl-sn-glycero-3-phosphocholine in which the acyl group is specified as (9Z)-12-hydroxyoctadec-9-enoyl.


The conjugate acid of L-tryptophanamide arising from protonation of the alpha-amino group; major species at pH 7.3.


An organic cation that is the conjugate acid of tropisetron, obtained by protonation of the tertiary amino group.


6-O-demethylthebaine zwitterion

Major species at pH 7.3


Se-methylselenocysteinium

An alpha-amino acid cation having methylselanylmethyl as the side-chain.


phosphatidylcholine (15:1/18:2)

A phosphatidylcholine 33:3 in which the fatty acyl groups at positions 1 and 2 are specified as C15:1 and C18:2 respectively.


phosphatidylcholine 28:4

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 28 carbons in total with 4 double bonds.


lysophosphatidylcholine O-14:0

A monoalkyl-sn-glycero-3-phosphocholine in which the alkyl group (position not specified) contains 14 carbons and is fully saturated.


Dication of N-(3-aminopropyl)-4-aminobutanal arising from protonation of both nitrogens.


A quaternary ammonium ion that is the N,N,N-trimethyl derivative of 3-(2,2,2-trifluoro-1,1-dihydroxyethyl)aniline.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 20 carbons and 2 double bonds.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the 1- and 2-acyl groups are specified as pentadecanoyl and octadecanoyl respectively.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 26 carbons and 0 double bonds and is 2-hydroxylated.


An organic cation that is the conjugate acid of fingolimod.


A  phosphatidylcholine 38:3 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (8Z,11Z,14Z)-eicosatrienoyl respectively.


A 1-(alk-1-enyl)-2-acyl-sn-glycero-3-phosphocholine in which the 2-acyl substituent is specified as acetyl.


A 2-acyl-sn-glycero-3-phosphocholine in which the acyl group is specified as tertadecanoyl (myristoyl).


An ammonium ion resulting from the protonation of the tertiary amino group of lycanthone.


sphingomyelin 30:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 30 with 1 double bond.


Dication of berbamunine arsing from protonation of both tertiary amino groups; major species at pH 7.3.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the 1- and 2-acyl groups are specified as hexadecanoyl and 7-oxoheptanoyl respectively.


An alpha-amino-acid cation obtained by protonation of both amino groups of lysine.


An ammonium ion derivative obtained from protonation of the nitrogens of emetine. It is the major species at pH 7.3.


An organic cation that is the conjugate acid of phenazopyridine.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 19 carbons and 0 double bonds and is 2-hydroxylated.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 23 carbons and 0 double bonds.


phosphatidylcholine (20:4/20:5)

A phosphatidylcholine 40:9 in which the fatty acyl groups at positions 1 and 2 are specified as C20:4 and C20:5 respectively.


An ammonium ion derivative resulting from the protonation of the amino group of 4-{2-[(2-hydroxybenzyl)amino]ethyl}-2,5-dimethoxybenzonitrile.


A primary ammonium ion that is the conjugate acid of 3-methoxytyramine resulting from the protonation of the primary amino group; Major microspecies at pH 7.3.


An organic cation that is the conjugate acid of (S)-laudanosine, obtained by protonation of the tertiary amino group; major species at pH 7.3.


A cationic sphingoid that is the conjugate acid of 3-dehydrohexadecasphinganine, obtained by protonation of the primary amino function; major species at pH 7.3.


phosphatidylcholine 33:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups specified at C-1 and C-2 contain 33 carbons in total with 1 double bond.


A lysophosphatidylcholine with defined stereochemistry where the position of the acyl group is unknown.


The conjugate base of a 1-acyl-2-linoleoyl-sn-glycero-3-phosphocholine compound formed by deprotonation of the phosphate OH group.


sphingomyelin 34:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 34 with 1 double bond.


A 1-hexanoyl-2-acyl-sn-glycero-3-phosphocholine in which the acyl group at position 2 is specified as heptanoyl.


selenocysteinium

An alpha-amino-acid cation resulting from the protonation of the amino group of selenocysteine.


ajmalinium

Conjugate acid of ajmaline.


validamycin A(1+)

An ammonium ion resulting from the protonation of the amino group of validamycin A. The major species at pH 7.3.


D-methioninium

The D-enantiomer of methioninium.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and 2 are specified as hexadecanoyl and (5Z,8Z,10E,12S,14Z)-12-hydroxyicosatetraenoyl respectively.


An alpha-amino-acid cation obtained by protonation of the alpha-amino and imine functions of N(6)-acetimidoyl-L-lysine


An ammonium ion resulting from the protonation of the amino group of butamben.


An ammonium ion obtained by the protonation of the amino group of N-(4-aminobutyl)-5-chloronaphthalene-2-sulfonamide.


dodecyltrimethylammonium ion

A quarternary ammonium cation having one dodecyl and three methyl substituents around the central nitrogen.


A phosphatidylcholine 28:0 in which both acyl groups have 14 carbons and fully saturated.


phosphatidylcholine 37:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 37 carbons in total with 2 double bonds.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 23 carbons and 4 double bonds and is 2-hydroxylated.


p-nitrophenylphosphocholine

A phosphocholine that is the 4-nitrophenyl ester of choline phosphate.


lysophosphatidylcholine 20:0

A lysophosphatidylcholine in which the remaining acyl group contains 20 carbons and 0 double bonds. If R1 is the acyl group and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is the acyl group then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


phosphatidylcholine (22:6/22:6)

A phosphatidylcholine 44:12 in which the fatty acyl groups at positions 1 and 2 are both specified as C22:6.


A secondary ammonium ion that is the conjugate acid of perivine obtained by protonation of the secondary amino group; major species at pH 7.3.


An organic cation obtained by the protonation of the amino group of FR901469.


phosphatidylcholine 44:1-2OH

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 44 carbons in total with 1 double bond and 2 hydroxyl groups.


A phosphatidylcholine 36:4 in which the acyl groups specified at positions 1 and 2 are (9Z)-octadecenoyl and (6Z,9Z,12Z)-octadecatrienoyl respectively.


Conjugate acid of D-2-aminohexano-6-lactam.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 26 carbons and 4 double bonds.


The ammonium ion resulting from the protonation of the amino group of scopolamine.


phosphatidylcholine 42:3

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 42 carbons in total with 3 double bonds.


Trication of N(1)-acetylspermine arising from protonation of the one primary and two secondary amino groups; major species at pH 7.3.


An optically active form of lysinium having D-configuration.


A phosphatidylcholine 38:6 in which the acyl groups specified at positions 1 and 2 are (5Z,8Z,11Z,14Z)-eicosatetraenoyl and (9Z,12Z)-octadecadienoyl respectively.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and 2 are specified as capryl (decanoyl).


An organic cation obtained by protonation of the five amino groups of tobramycin.


A sphingomyelin in which the sphingoid component is specified as C17-sphingosine.


A  phosphatidylcholine 42:2 in which the acyl groups specified at positions 1 and 2 are hexadecanoyl and (5Z,9Z)-hexacosadienoyl respectively.


phosphatidylcholine P-36:5

A 1-O-(alk-1-enyl)-2-O-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups at positions 1 and 2 contain 36 carbon atoms in total with 5 additional double bonds.


A 1-palmitoyl-2-acyl-sn-glycero-3-phosphocholine in which the 2-acyl group is specified as 5-hydroxypentanoyl.


phosphatidylcholine O-40:6

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 40 carbons and 6 double bonds.


Conjugate acid of 1D-myo-inositol 2-amino-2-deoxy-alpha-D-glucopyranoside arising from protonation of the nitrogen.


phosphatidylcholine 42:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 42 carbons in total with 1 double bond.


phosphatidylcholine (P-16:0/16:1)

A phosphatidylcholine P-32:1 in which the 1-alk-1-enyl group contains 16 carbons and no additional double bonds while the 2-acyl group contains 16 carbons and 1 double bond.


A glycerophosphocholine that is sn-glycero-3-phosphocholine in which positions 1 and 2 are substituted by unspecified acyl and alkyl groups, and in which the positions of the acyl and alkyl groups are also unspecified.


An ammonium ion resulting from the protonation of the secondary amino group of quinapril.


An ammonium ion resulting from the protonation of the nitrogen of alvarine.


A monoalkylglycerophosphocholine in which the alkyl group may be attached to the sn-1 or sn-3 position.


sphingomyelin 44:6

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 44 with 6 double bonds.


sphingomyelin 43:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 43 with 2 double bonds.


A sphingomyelin 41:2 obtained by formal condensation of the carboxy group of any tetracosenoic acid with the amino group of hexadecasphingosine-1-phosphocholine.


A primary aliphatic ammonium ion that is the conjugate acid of 2-methylpropanamine.


lysophosphatidylcholine 22:2

A lysophosphatidylcholine in which the remaining acyl group contains 22 carbons and 2 double bonds. If R1 is the acyl group and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is the acyl group then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


An alpha-amino-acid cation that is the conjugate acid of 4-chloro-L-lysine zwitterion; major species at pH 7.3.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 25 carbons and 0 double bonds.


An organic cation that is the conjugate acid of carmoxirole, arising from protonation of the tertiary amino group.


sphingomyelin d18:1/16:0

A sphingomyelin d18:1 in which the fatty acyl group contains 16 carbons and is fully saturated.


A N-acylsphinganine-1-phosphocholine in which the acyl group specified is tetracosanoyl.


sphingomyelin 14:0

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 14 with 0 double bonds.


An alkane-alpha,omega-diammonium(2+) that is the dication of 2-hydroxyputrescine arising from protonation of both primary amino groups; major species at pH 7.3.


phosphatidylcholine O-36:4

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 36 carbons and 4 double bonds.


sphingomyelin d18:1/18:3

A sphingomyelin d18:1 in which the total number of carbons in the fatty acyl group is 18 with 3 double bonds.


phosphatidylcholine (18:3/22:6)

A phosphatidylcholine 40:9 in which the fatty acyl groups at positions 1 and 2 are specified as C18:3 and C22:6 respectively.


phosphatidylcholine (P-37:4)

A 1-O-(alk-1-enyl)-2-O-acyl-sn-glycero-3-phosphocholine in which the unspecified alk-1-enyl and acyl groups at positions 1 and 2 contain 37 carbon atoms in total with 4 additional double bonds in the acyl moiety.


A secondary ammonium ion resulting from the protonation of one of the amino groups of (1S,7R,8R,14S)-15,17-diazatetracyclo[12.2.2.1(3,7).1(8,12)]icosa-3(20),12(19)-diene-6,9-dione. This is compound 7 of pmid:27690412.


dodeclonium bromide

An aromatic ether that is 4-chlorophenol in which the hydroxy group is replaced by a 2-[dodecyl(dimethyl)azaniumyl]ethoxy group.


sphingomyelin 32:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 32 with 2 double bonds.


An organic cation obtained by protonation of the  six amino groups of framycetin; major species at pH 7.3.


C17 sphingosine(1+)

A cationic sphingoid that is the conjugate acid of C17 sphingosine, obtained by protonation of the primary amino function; major species at pH 7.3.


An ammonium ion that is the conjugate acid of (S)-1,2-distearoylphosphatidylethanolamine, arising from protonation of the amino group.


sphingomyelin 33:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 33 with 2 double bonds.


A phosphatidylcholine 40:4 in which the two acyl substituents at positions 1 and 2 are specified as stearoyl and (7Z,10Z,13Z,16Z)-docosatetraenoyl respectively.


An organic cation obtained by protonation of the two amino groups of 2-chloro-1,4-phenylenediamine.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 28 carbons and 0 double bonds and is 2-hydroxylated.


An organic cation obtained by protonation of the tertiary amino group of (4aR,10bS)-noroxomaritidine; major species at pH 7.3.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 25 carbons and 0 double bonds and is 2-hydroxylated.


A 1-(Z)-alk-1-enyl-2-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups are specified as (1Z)-octadecenyl and (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl respectively.


An organic cation obtained by protonation of the tertiary amino group of amodiaquine; major species at pH 7.3.


An ammonium ion resulting from the protonation of the nitrogen of (S)-benproperine.


A primary ammonium ion obtained by protonation of the primary amino function of (1S,2R)-tranylcypromine.


A 1-O-acyl-sn-glycero-3-phosphocholine in which the acyl group is specified as caproyl (hexanoyl).


An organic cation obtained by protonation of the secondary amino function of (S)-orciprenaline.


phosphatidylcholine 44:0-2OH

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 44 carbons in total with 0 double bonds and 2 hydroxy groups.


A phosphatidylcholine O-34:3 in which the alkyl and acyl groups specified at positions 1 and 2 are hexadecyl and (6Z,9Z,12Z)-octadecatrienoyl respectively.


phosphatidylcholine 44:2-2OH

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 44 carbons in total with 2 double bonds and 2 hydroxy groups.


A 1-O-(alk-1-enyl)-2-palmitoyl-sn-glycero-3-phosphocholine in which the alk-1-enyl group has Z geochemistry.


A phosphatidylcholine O-38:3 in which the alkyl and acyl groups specified at positions 1 and 2 are octadecyl and (8Z,11Z,14Z)-eicosatrienoyl respectively.


An ammonium ion resulting from the protonation of the amino group of (2E,5S,6E,8E,10E)-1-aminododeca-2,6,8,10-tetraen-5-ol. The major species at pH 7.3.


phosphatidylcholine 28:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 28 carbons in total with 2 double bonds.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 19 carbons and 0 double bonds.


A singly-charged organic cation obtained by protonation of gevotroline.


sphingomyelin 31:0

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 31 with no double bonds.


An organic cation obtained by protonation of the secondary amino function of (R,S,S,S)-nebivolol.


An organic cation obtained by protonation of the two free amino groups of 2-deoxystreptamine; major species at pH 7.3.


A sphingomyelin d18:1 obtained by formal condensation of the carboxy group of pentacosanoic acid with the amino group of sphingosine.


The ammonium ion resulting from the protonation of the amino group of psychosine.


The trialkylammonium ion resulting from the protonation of the amino group of oripavine; Major species at pH 7.3.


phosphatidylcholine 42:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 42 carbons in total with 2 double bonds.


An organic cation obtained by protonation of four of the five amino groups of caldopentamine.


A primary ammonium ion resulting from the protonation of the amino group of 2-amino-2-deoxy-D-galactopyranose. Major species at pH 7.3.


A phosphatidylcholine 30:1 in which the acyl groups at positions 1 and 2 are myristoyl and palmitoleoyl respectively.


Conjugate acid of 1D-myo-inositol 2-(L-cysteinylamino)-2-deoxy-alpha-D-glucopyranoside arising from protonation of the amino acid nitrogen.


An organic cation obtained by protonation of the four amino groups of ribostamycin; major species at pH 7.3.


phosphatidylcholine 28:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 28 carbons in total with 1 double bond.


A 1-acyl-sn-glycero-3-phosphocholine in which the 1-acyl group contains 16 carbons and 1 double bond.


A phosphatidylcholine 38:6 in which the acyl groups at C-1 and C-2 are specified as hexadecanoyl and (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl respectively.


The conjugate acid of (S)-nicotine arising from selective protonation of the tertiary amino group; major species at pH 7.3.


A quaternary ammonium ion obtained by protonation of the four primary amino groups of N(4)-bis(aminopropyl)spermidine.


A phosphatidylcholine 34:1 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (9Z)-hexadecenoyl respectively.


SIS3 free base(1+)

An ammonium ion resulting from the addition of a proton to the free base of SIS3.


sphingomyelin 30:0

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 30 with 0 double bonds.


A glycerophosphocholine having an unspecified acyl group attached at the 2-position.


phosphatidylcholine 20:5

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two phosphatidyl acyl groups contain a total of 20 carbons and 5 double bonds.


phosphatidylcholine 33:0

A phosphatidylcholine in which the two acyl groups contain a total of 33 carbons and no double bonds.


An ammonium ion resulting from the protonation of both nitrogen atoms of bedaquiline.


ammonioacetaldehyde

An organic cation that is the conjugate acid of aminoacetaldehyde, arising from protonation of the amino group; major species at pH 7.3.


An organic cation obtained by protonation of the amino group of 4-methoxy-3-indolylmethylamine.


A quaternary ammonium ion that is (S)-N-methylcanadine in which the hydrogen at position 14 is substituted by a hydroxy group.


phosphatidylcholine O-31:0

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 31 carbons and 0 double bond.


A  sphingomyelin in which the N-acyl group and sphingoid base are specified as tricosenoyl and sphingosine respectively.


A 1,2-diacyl-sn-glycero 3-phosphocholine in which the acyl group at position 1 is unspecified while that at position 2 is specified as (R)-12-hydroxyoleoyl.


Major species at pH 7.3.


An organic cation obtained by protonation of the imino group of (R)-2-methylpyrrolidine. It is the major microspecies at pH 7.3


kanamycin C(4+)

An organic cation obtained by protonation of the primary amino groups of kanamycin C.


A phosphatidylcholine O-40:4 in which the alkyl and acyl groups specified at positions 1 and 2 are octadecyl and (7Z,10Z,13Z,16Z)-docosatetraenoyl respectively.


An alpha-amino-acid cation that is the conjugate base of N(6)-methyl-L-lysine, arising from protonation of the two amino groups and deprotonation of the carboxylic acid; major species at pH 7.3.


A 1-(Z)-alk-1-enyl-2-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups are specified as (1Z)-hexadecenyl and hexadecanoyl respectively.


A 1-O-(alk-1-enyl)-2-O-acyl-sn-glycero-3-phosphocholine having palmitoyl as the 2-acyl group.


sphingomyelin 32:4

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 32 with 4 double bonds.


A lysophosphatidylcholine in which the acyl group (position not specified) is (9Z)-12-hydroxyoctadec-9-enoyl. Formula:C26H52NO8P.


A singly-charged organic cation obtained by protonation of 4-fluoro-N-{2-[4-(7-methoxynaphthalen-1-yl)piperazin-1-yl]ethyl}benzamide.


A 1-thio-sn-glycero-3-phosphocholine compound having 1-S-hexadecyl- and 2-O-hexadecylphosphono substituents.


tenofovir alafenamide(1+)

An organic cation obtained by protonation of the exocyclic amino group of tenofovir alafenamide.


A phosphatidylcholine O-40:1 in which the alkyl and acyl groups at positions 1 and 2 are octadecyl and (11Z)-docosenoyl respectively.


piperidinium

The conjugate acid of piperidine; major species at pH 7.3.


lysophosphatidylcholine (18:3/0:0)

A lysophosphatidylcholine 18:3 in which the acyl group is located at position 1.


phosphatidylcholine (20:3/20:4)

A phosphatidylcholine 40:7 in which the fatty acyl groups at positions 1 and 2 are specified as C20:3 and C20:4 respectively.


phosphatidylcholine (18:1/20:4)

A phosphatidylcholine 38:5 in which the fatty acyl groups at positions 1 and 2 are specified as C18:1 and C20:4 respectively.


phosphatidylcholine (14:0/22:6)

A phosphatidylcholine 36:6 in which the fatty acyl groups at positions 1 and 2 are specified as C14:0 and C22:6 respectively.


An ammonium ion that is the conjugate acid of pyridoxamine arising from selective protonation of the primary amino group; major species at pH 7.3.


The cation resulting from the protonation of the amino group at the 4 position of (R)-N-tert-butylpiperazine-2-carboxamide.


phosphatidylcholine O-34:6

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 34 carbons and 6 double bonds.


sinapine

An acylcholine in which the acyl group specified is sinapoyl.


An organic cation obtained by protonation of the piperidine nitrogen of flecainide.


A phosphatidylcholine O-44:3 in which the alkyl and acyl groups specified at positions 1 and 2 are docosyl and (10Z,13Z,16Z)-docosatrienoyl respectively.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl substituents at positions 1 and 2 are specified as palmitoyl and valeroyl respectively.


An amino-acid cation that is the conjugate acid of 3,6-diaminohexanoic acid resulting from protonation of both amino groups and deprotonation of the carboxy group; major species at pH 7.3.


phosphatidylcholine 40:3

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 40 carbons in total with 3 double bonds.


phosphatidylcholine 40:5

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 40 carbons in total with 5 double bonds.


morpholinium

A secondary ammonium ion that is the conjugate acid of morpholine resulting from the protonation of the NH group. Major microspecies at pH 7.3.


(S)-bethanechol

The (S)-enantiomer of bethanechol.


dithioglycerophosphocholine

The dithioglycerol phosphate ester of a phosphocholine.


An organic cation resulting from the protonation of the amino group of thiocyclam.


L-phenylalaninium

An optically active form of phenylalaninium having L-configuration.


phosphatidylcholine (P-16:0/22:6)

A phosphatidylcholine P-38:6 in which the 1-alk-1-enyl group contains 16 carbons and no additional double bonds while the 2-acyl group contains 22 carbons and 6 double bonds.


A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the alkyl and the acyl groups at positions 1 and 2 are hexadecyl and (9Z)-nonadec-9-enoyl respectively.


phosphatidylcholine O-36:2

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 36 carbons and 2 double bonds.


(-)-ephedrinium

Conjugate acid of (-)-ephedrine.


A phosphatidylcholine 40:6 in which the acyl groups at C-1 and C-2 are (11Z)-octadecenoyl and (7Z,10Z,13Z,16Z,19Z)-docosapentaenoyl respectively.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 16 carbons and 1 double bond.


An ammonium ion resulting from the protonation of the amino group of 10-deoxymethymycin. Major species at pH 7.3.


An ammonium ion resulting from the protonation of the tertiary amino group of (-)-echitovenine. The major species at pH 7.3. Note the stereoconfiguration of the 19 hydroxy group is based on CHEBI:144373 (and Fig. S10).


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups specified at positions 1 and 2 are palmitoleoyl and stearoyl respectively.


sphingomyelin d18:1/20:2

A sphingomyelin d18:1 in which the fatty acyl group contains 20 carbons and 2 double bonds.


The tetracation of PoPo-1 dye.


A phosphatidylcholine 16:0_16:1 in which the acyl groups specified at positions 1 and 2 are palmitoleoyl and palmitoyl respectively.


phosphatidylcholine 37:1

A phosphatidylcholine in which the two acyl groups contain a total of 37 carbons and one double bond.


A lysophosphatidylcholine 22:6 in which the acyl group is specified as docosahexaenoyl and is located at position 2.


An amino-acid cation comprising psicosyllysine having a deprotonated carboxy group and both amino groups protonated; major species at pH 7.3.


Conjugate acid of 3'-demethylstaurosporine.


An ammonium ion resulting from the protonation of the tertiary amino group of (-)-minovincinine. The major species at pH 7.3.


pseudotropinium

Conjugate acid of pseudotropine.


A 2-acyl-sn-glycero-3-phosphocholine in which the acyl group is specified as 9-oxononanoyl.


sphingomyelin d18:1/20:1

A sphingomyelin d18:1 in which the total number of carbons in the fatty acyl group is 20 with 1 double bond.


An organic cation obtained by protonation of the tertiary amino group of (4aS,10bR)-noroxomaritidine; major species at pH 7.3.


An organic cation resulting from the protonation of the amino group of (R)-fluoxetine.


sphingomyelin d18:1/22:3

A sphingomyelin d18:1 in which the fatty acyl group contains 22 carbons and 3 double bonds.


An arsonium ion consisting of tetraphenylarsonium having two hydroxy groups at positions 3 and 4 on one of the phenyl rings.


phosphatidylcholine O-44:1

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 44 carbons and 1 double bond.


A quaternary ammonium ion in which the substituents on nitrogen are methyl (three) and 4-oxopentyl.


A sphingomyelin d18:1 in which the ceramide N-acyl group contains 16 carbons, 1 hydroxy group and 0 double bond.


A glycerophosphocholine that is glycero-3-phosphocholine bearing a single alkenyl group located at position 1.


phosphatidylcholine 30:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 30 carbons in total with 2 double bonds.


An organic cation that is the conjugate acid of vortioxetine, obtained by protonation of the secondary amino function.


phosphatidylcholine 42:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 42 carbons in total with 0 double bonds.


ethyltrimethylammonium

A quarternary ammonium cation having one ethyl and three methyl substituents around the central nitrogen.


A lysophosphatidylcholine in which the acyl group (position not specified) is linoleoyl.


lysophosphatidylcholine P-17:0

A 1-O-(alk-1-enyl)-sn-glycero-3-phosphocholine in which the alk-1-enyl group contains 17 carbons and no additional double bonds.


NAN 190(1+)

An organic cation obtained by selective protonation at position 1 of the piperidine ring in NAN 190.


An organic cation obtained by protonation of the secondary amino groups of spectinomycin.


A 1-alkyl-sn-glycero-3-phosphocholine in which the alkyl group is specified as (11Z)-octadecenyl.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 18 carbons and 0 double bonds and is 2-hydroxylated.


phosphatidylcholine 30:5

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 30 carbons in total with 5 double bonds.


A phosphatidylcholine O-40:5 in which the alkyl and acyl groups specified at positions 1 and 2 are octadecyl and (4Z,7Z,10Z,13Z,16Z)-docosapentaenoyl respectively.


phosphatidylcholine O-44:4

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 44 carbons and 4 double bonds.


phosphatidylcholine O-44:5

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 44 carbons and 5 double bonds.


phosphatidylcholine (18:0/20:3)

A phosphatidylcholine 38:3 in which the fatty acyl groups at positions 1 and 2 are specified as C18:0 and C20:3 respectively.


phosphatidylcholine 44:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 44 carbons in total with 2 double bonds.


An alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino groups of (4-{4-[2-(gamma-L-glutamylamino)ethyl]phenoxymethyl}furan-2-yl)methanamine: major species at pH 7.3.


A phosphatidylcholine 36:4 in which the 1- and 2-acyl groups are specified as hexadecanoyl (palmitoyl) and 5Z,8Z,11Z,14Z-eicosatetraenoyl (arachidonoyl) respectively.


A (14)C-modified compound that is the 1,2-di-O-palmitoyl-derivative of sn-glycero-3-phosphocholine where both palmitoyl groups have (14)C labels at the C-1 position.


A glycerophosphocholine that is sn-glycero-3-phosphocholine in which positions 1 and 2 are substituted by unspecified alkyl groups.


methacholine

A quaternary ammonium ion in which the nitrogen is substituted with three methyl groups and a 2-acetoxypropyl group. Parasympathomimetic bronchoconstrictor drug used in clinical diagnosis.


The alpha-amino-acid cation formed from carboxyspermidine by zwitterion formation between the carboxy and alpha-amino groups and protonation of the nitrogen atoms at positions 5 and 10; the major structure of carboxyspermidine at pH 7.3.


(S)-atropinium

An organic cation that is the conjugate acid of (S)-atropine arising from protonation of the tertiary amino group; major species at pH 7.3.


A phosphatidylcholine 36:1 in which the phosphatidyl acyl groups at positions 1 and 2 are specified as oleoyl and stearoyl respectively.


phosphatidylcholine 35:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 35 carbons in total with 1 double bond.


A sphingomyelin 33:1 obtained by formal condensation of the carboxy group of hexadecanoic acid with the amino group of 15-methylhexadecasphingosine-1-phosphocholine. It is a metabolite of the nematode Caenorhabditis elegans.


name: N-[(R)-2-hydroxy-very-long-chain fatty acyl]-(R)-4-hydroxysphingoid base


phosphatidylcholine P-38:6

A 1-O-(alk-1-enyl)-2-O-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups at positions 1 and 2 contain 38 carbon atoms in total with 6 additional double bonds.


phosphatidylcholine 40:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 40 carbons in total with 0 double bonds.


A phosphatidylcholine 38:1 in which the acyl groups specified at positions 1 and 2 are tetradecanoyl and (15Z)-tetracosenoyl respectively.


L-serinium

A serinium that is the conjugate acid of L-serine, obtained by protonation of the amino group.


aclacinomycin A(1+)

An anthracycline cation that is the conjugate acid of aclacinomycin A, obtained by protonation of the tertiary amino group.


phosphatidylcholine O-38:1

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 38 carbons and 1 double bond.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 26 carbons and 0 double bonds.


phosphatidylcholine (16:0/17:1)

A phosphatidylcholine 33:1 in which the fatty acyl groups at positions 1 and 2 are specified as C16:0 and C17:1 respectively.


sphingomyelin d18:1/16:1

A sphingomyelin d18:1 in which the fatty acyl group contains 16 carbons and 1 double bond


A sphingomyelin 34:1 obtained by formal condensation of the carboxy group of octadecanoic acid with the amino group of hexadecasphingosine-1-phosphocholine.


An ammonium ion derivative that is the conjugate acid of 5-aminopentanal, obtained by protonation of the amino group; major species at pH 7.3.


A phosphatidylcholine 38:4 in which one acyl group has 18 carbons and is fully saturated while the other has 20 carbons and 4 double bonds (position not specified).


A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the alkyl and the acyl groups at positions 1 and 2 are specified as hexadecyl and 4-oxobutyl respectively.


A lysophosphatidylcholine 16:1 in which the acyl group is specified as (9Z)-hexadecenoyl and is located at either position 1 or 2.


The L-enantiomer of histidinium(2+).


phosphatidylcholine (18:2/20:1)

A phosphatidylcholine 38:3 in which the fatty acyl groups at positions 1 and 2 are specified as C18:2 and C20:1 respectively.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 18 carbons and 0 double bonds.


sphingomyelin d18:1(1+)

A quaternary ammonium ion that is the conjugate acid of sphingomyelin d18:1, obtined by protonation of the anionic phosphate function.


An organic cation obtained by protonation of the secondary amino function of panobinostat.


A phosphatidylcholine 36:3 in which the acyl groups at positions 1 and 2 are specified as octadecanoyl and (5Z,8Z,11Z)-icosatrienoyl respectively.


A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the alkyl and the acyl groups at positions 1 and 2 are hexadecyl and propionyl respectively.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 20 carbons and 4 double bonds and is 2-hydroxylated.


A 2-acyl-sn-glycero-3-phosphocholine in which the 2-acyl group contains 16 carbons and 1 double bond.


A 1,2-diacyl-sn-glycero-3-phosphocholine where the acyl group at position 1 is unspecified while the acyl group at position 2 is palmitoyl.


homoserinium lactone

The conjugate acid of homoserine lactone; major species at pH 7.3.


An organic cation obtained by protonation of the four amino groups of N(4)-aminopropylspermidine.


A sphingomyelin that is phytosphingosine-1-phosphocholine having an unspecified fatty acyl group attached to the nitrogen.


An arylmethylammonium that is the conjugate acid of vanillylamine obtained from the protonation of the primary amino group. Major species at pH 7.3.


phosphatidylcholine 35:6

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 35 carbons and 6 double bonds.


A phosphatidylcholine 38:5 in which the acyl groups at positions 1 and 2 are hexadecanoyl and (7Z,10Z,13Z,16Z,19Z)-docosapentaenoyl respectively.


An ammonium ion resulting from the protonation of the tertiary amino group of bromhexine. It is the major species at pH 7.3.


A 1-(Z)-alk-1-enyl-2-oleoyl-sn-glycero-3-phosphocholine in which the alkenyl group specified is (1Z)-hexadecenyl.


phosphatidylcholine O-36:3

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 36 carbons and 3 double bonds.


phosphatidylcholine O-34:3

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 34 carbons and 3 double bonds.


D-valinium

The D-enantiomer of valinium.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 25 carbons and 4 double bonds and is 2-hydroxylated.


(R)-laudanosolinium

Conjugate acid of (R)-laudanosoline arising from protonation of the isoquinoline nitrogen; major microspecies at pH 7.3.


lysophosphatidylcholine (22:5/0:0)

A lysophosphatidylcholine 22:5 in which the acyl group is located at position 1.


phosphatidylcholine 34:3

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 34 carbons in total with 3 double bonds.


An ammonium ion resulting from the protonation of the nitrogen of the tertiary amino group of lomitapide.


sphingomyelin 39:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 39 with 2 double bonds.


D-glutaminium

An optically active form of glutaminium having D-configuration.


phosphatidylcholine 30:3

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 30 carbons in total with 3 double bonds.


sphingomyelin 40:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 40 with 2 double bonds.


A 1-O-acyl-sn-glycero-3-phosphocholine obtained by formal condensation of one of the carboxy groups of azelaic acid with the 1-hydroxy group of sn-glycero-3-phosphocholine.


A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the alkyl and the acyl groups at positions 1 and 2 are specified as icosyl and (9Z,12Z)-octadecadienoyl respectively.


A 1,2-diacyl-sn-glycero-3-phosphocholine where the 2-O-acyl group is specified as linoleoyl.


An ammonium ion resulting from the protonation of all three amino groups of 6'-oxoparomamine. The major species at pH 7.3.


An ammonium ion that is the conjugate acid of serotonin; major species at pH 7.3.


A polar amino acid zwitterion of L-ornithine.


A 1,2-dialkyl-sn-glycero-3-phosphocholine in which the 1- and 2- alkyl groups are specified as [3]-ladderanehexanyl and [3]-ladderaneoctanyl respectively.


D-threoninium

The D-enantiomer of threoninium.


An ammonium ion resulting from the protonation of the tertiary amino group of (16S)-deshydroxymethyl-stemmadenine.


A 2-acyl-sn-glycero-3-phosphocholine in which the acyl group is specified as (15R)-hydroxy-(5Z,8Z,11Z,13E)-icosatetraenoyl.


phosphatidylcholine (16:2/16:0)

A phosphatidylcholine 32:2 in which the fatty acyl groups at positions 1 and 2 are specified as C16:2 and C16:0 respectively.


A 1-(1Z)-alkenyl-2-acyl-sn-glycero-3-phosphocholine in which the 2-acyl group is specified as acetyl.


A phosphatidylcholine 34:3 in which the acyl groups specified at positions 1 and 2 are palmitoleoyl and linoleoyl respectively.


m-tyraminium

An ammonium ion that is the conjugate acid of m-tyramine; major species at pH 7.3.


A 1-alkyl-sn-glycero-3-phosphocholine in which the alkyl group is specified as tetradecyl.


A lysophosphatidylcholine 20:4 in which the acyl group at position 1 is (5Z,8Z,11Z,14Z)-icosatetraenoyl (arachidonoyl) and the hydroxy group at position 2 is unsubstituted.


An ammonium ion resulting from the addition of a proton to the piperazine nitrogen which is attached to the alkyl chain. The major species at pH 7.3.


A guanidinium ion resulting from the protonation of both the primary amino and guanidino groups and deprotonation of the carboxy group of 5-hydroxy-L-arginine; Major microspecies at pH 7.3.


phosphatidylcholine (O-16:1/20:4)

A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the acyl group contains 20 carbons and 4 double bonds while the alkyl group contains 16 carbons and 1 double bond.


geneticin cation(4+)

Major microspecies at pH 7.3.


sphingomyelin 39:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 39 with 1 double bond.


A phosphatidylcholine 38:1 in which the acyl groups specified at positions 1 and 2 are hexadecanoyl and (13Z)-docosenoyl respectively.


phosphatidylcholine 42:10

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 42 carbons in total with 10 double bonds.


A  phosphatidylcholine 38:0 in which the acyl groups specified at positions 1 and 2 are tetracosanoyl and tetradecanoyl respectively.


herquline B(1+)

A secondary ammonium ion that is the conjugate acid of herquline B resulting from the protonation of the secondary amino group; Major species at pH 7.3.


tyraminium

An ammonium ion that is the conjugate acid of tyramine; major species at pH 7.3.


A phosphatidylcholine 40:8 in which one acyl group has 18 carbons and 2 double bonds while the other has 22 carbons and 6 double bonds (position not specified).


An organic cation obtained by protonation of the secondary amino function of N-(2,3-dihydro-1,4-benzodioxin-2-ylmethyl)-2-(2,6-dimethoxyphenoxy)ethanamine.


A sphingomyelin d18:1 in which the amino group of sphingosine is substituted by a pentadecanoyl group.


phosphatidylcholine O-40:7

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 40 carbons and 7 double bonds.


An organic cation that is the conjugate acid of 3-aminopropanal, formed by protonation of the amino group; major species at pH 7.3.


A 1-(Z)-alk-1-enyl-2-acyl-sn-glycero-3-phosphocholine in which the alkeny and acyl group specified at positions 1 and 2 are (1Z)-octadecenyl and (9Z)-octadecenoyl respectively.


An N-octadecenoylsphinganine-1-phosphocholine obtained by formal condensation of the carboxy group of (11Z)-octadecenoic acid with the amino group of sphinganine-1-phosphocholine.


A sphingomyelin 32:2 obtained by formal condensation of the carboxy group of tetradecanoic acid with the amino group of any sphingadienine-1-phosphocholine.


An organic cation that is the conjugate acid of neomethymycin, obtained by protonation of the tertiary amino group; major species at pH 7.3.


A sphingomyelin 34:2 obtained by formal condensation of the carboxy group of hexadecanoic acid with the amino group of any sphingadienine-1-phosphocholine.


A cationic sphingoid that is the conjugate acid of 15-methylhexadecasphing-4-enine, obtained by protonation of the amino group; major species at pH 7.3.


N,N,N-trimethylglycyl-CoA

An acyl-CoA that results from the formal condensation of the thiol group of coenzyme A with the carboxy group of glycine betaine.


A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the alkyl and the acyl groups at positions 1 and 2 are specified as hexadecyl and glutaryl respectively.


A 1-acyl-sn-glycero-3-phosphocholine in which the 1-acyl group contains 20 carbons and 5 double bonds.


An ammonium ion resulting from the protonation of the tertiary amino group of (+)-vincadifformine. The major species at pH 7.3.


An organic cation obtained by protonation of the amino group of alpha-D-kanosamine.


triethanolammonium

An organic cation obtained by protonation of the tertiary amino group of triethanolamine.


A glycero-3-phosphocholine compound having an alk-1-enyl substituent at the 1-position and an acyl substituent at the 2-position.


An organic cation obtained by protonation of the amino function of pavine; major species at pH 7.3.


An alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino groups of (2R,5S)-2,5-diaminohexanoic acid; major species at pH 7.3.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the phosphatidyl acyl groups at positions 1 and 2 are specified as palmitoyl and 8-epi-prostaglandin F2alpha respectively.


An organic cation that is the conjugate acid of N(alpha)-acetyl-L-lysine methyl ester, obtained by protonation of the side-chain amino group; major species at pH 7.3.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 26 carbons and 4 double bonds and is 2-hydroxylated.


An indole alkaloid cation that is the conjugate acid of 17-O-acetylnorajmaline, obtained by protonation of the tertiary amino function.  Major microspecies at pH 7.3 (according to Marvin v 6.2.0.).


lysophosphatidylcholine O-18:1

A monoalkylglycerophosphocholine in which the alkyl group contains 18 carbons and one double bond. If R1 is an alkenyl group and R2 is a hydrogen then the molecule is a 1-alkenyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is an alkenyl group then the molecule is a 2-alkenyl-sn-glycero-3-phosphocholine.


The ammonium ion resulting from protonation of all three amino groups of bis(3-aminopropyl)amine; major species at pH 7.3.


A phosphatidylcholine 36:0 in which the acyl groups specified at positions 1 and 2 are docosanoyl and tetradecanoyl respectively.


An organic cation and conjugate acid of 5-aminopentanamide, arising from protonation of the amino group; major species at pH 7.3.


phosphatidylcholine 38:6

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 38 carbons in total with 6 double bonds.


phosphatidylcholine O-34:0

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 34 carbons and 0 double bonds.


A glycerophosphocholine that is sn-glycero-3-phosphocholine bearing a single alkyl substituent at an unspecified position (either R(1) = H, R(2) = alkyl or R(1) = alkyl, R(2) = H).


A secondary ammonium ion that is the conjugate acid of heliamine resulting from the protonation of the amino group; Major species at pH 7.3.


phosphatidylcholine 38:4

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 38 carbons in total with 4 double bonds.


dopamine quinone(1+)

A primary ammonium ion that is the conjugate acid of dopamine quinone, resulting from the protonation of the primary amino group. Major species at pH 7.3.


An ammonium ion resulting from the protonation of the tertiary amino group of (16R)-deshydroxymethyl-stemmadenine.


A sphingomyelin 36:2 obtained by formal condensation of the carboxy group of octadecanoic acid with the amino group of any sphingadienine-1-phosphocholine.


A phosphatidylcholine 32:0 in which the acyl group specified at positions 1 and 2 are stearoyl and myristoyl respectively.


A 1,2-diacyl-sn-glycero-3-phosphocholine having palmitoyl and 5-oxovaleryl groups at the 1- and 2-positions respectively.


lysophosphatidylcholine O-16:0/0:0

A lysophosphatidylcholine O-16:0e in which the hexadecyl group at C-1 contains 16 carbons of which none are unsaturated.


phosphatidylcholine 32:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 32 carbons in total with 1 double bond.


D-tryptophanium

The D-enantiomer of tryptophanium.


phosphatidylcholine 18:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 18 carbons and no double bonds.


An sn-glycero-3-phosphocholine substituted at the 1-oxygen by an alk-1-enyl group.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 21 carbons and 0 double bonds.


6'''-hydroxyneomycin C(5+)

An organic cation obtained by protonation of the five free amino groups of 6'''-hydroxyneomycin C; major species at pH7.3.


An ammonium ion resulting from the protonation of the piperidine nitrogen of pergolide.


lysophosphatidylcholine 22:5

A lysophosphatidylcholine in which the acyl group (position not specified) contains 22 carbons with 5 double bonds.


7''-O-phosphohygromycin B(1+)

Conjugate acid of 7''-O-phosphohygromycin B arising from protonation of the three amino groups and deprotonation of the phosphate OH groups; major species at pH 7.3.


LYSOPHOSPHATIDYLCHOLINE

A 1-O-acyl-sn-glycero-3-phosphocholine in which the acyl group is specified as lauroyl (dodecanoyl)


A cationic sphingoid obtained by the protonation of the amino group of 14-methylhexadecasphingosine; major species at pH 7.3.


An ammonium ion that is obtained by protonation of the amino group of D-glucosylsphingosine. Major species at pH 7.3.


phosphatidylcholine (20:4/P-18:1)

A 1-acyl-2-(alk-1-enyl)-sn-glycero-3-phosphocholine in which the acyl group contains 20 carbons and 4 double bonds while the alk-1-enyl group contains 18 carbons with 1 additional double bond.


A sphingomyelin d18:1 in which the ceramide N-acyl group contains 16 carbons, 1 hydroxy group and 1 double bond.


A sphingomyelin in which the sphingoid component is specified as icosasphingosine.


An ammonium ion resulting from the protonation of the tertiary amino group of ajmalicine. The major species at pH 7.3.


A sphingomyelin in which the total number of carbons in the fatty acyl group is 24 with 2 double bonds.


A lysophosphatidylcholine 20:4 in which the the acyl group at position 1 is specified  as (8Z,11Z,14Z,17Z)-icosatetraenoyl.


benzyl cetraxate(1+)

The conjugate acid of benzyl cetraxate; major species at pH 7.3.


S-acetylcysteaminium

The organic cation that is the conjugate acid of S-acetylcysteamine; major species at pH 7.3.


A sphingomyelin d18:1 in which the acyl group specified is heptadecanoyl.


phosphatidylcholine (20:3/22:6)

A phosphatidylcholine 42:9  in which the fatty acyl groups at positions 1 and 2 are specified as C20:3 and C22:6 respectively.


4-O-methylrhodomycin D(1+)

An organic cation that is the conjugate acid of 4-O-methylrhodomycin D, obtained by protonation of the amino group; major species at pH 7.3.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 16 carbons and 0 double bonds and is 2-hydroxylated.


An ammonium ion derivative resulting from the protonation of the  amino group of (S)-codamine. The major species at pH 7.3.


A lysophosphatidylcholine 16:1 in which the 1-acyl group is (9E)-hexadecenoyl.


phosphatidylcholine (16:1/18:2)

A phosphatidylcholine 34:3 in which the fatty acyl groups at positions 1 and 2 are specified as C16:1 and C18:2 respectively.


gamma-butyrobetainyl-CoA

An acyl-CoA that results from the formal condensation of the thiol group of coenzyme A with the carboxy group of 4-trimethylammoniobutanoic acid.


A glycerophosphocholine compound having O-acyl substituents at both the 1- and 2-positions of the glycerol. It is a major constituent of cell membranes.


A 1,2-diacyl-sn-glycero-3-phosphocholine where the acyl groups at positions 1 and 2 are palmitoyl and hexanoyl respectively.


A N-octadecenoylsphingosine-1-phosphocholine in which the acyl group specified is (11Z)-octadecenoyl.


sphingomyelin d18:1/18:1

A sphingomyelin d18:1 in which the fatty acyl group contains 16 carbons and 1 double bond


phosphatidylcholine (P-16:0/18:3)

A phosphatidylcholine P-34:3 in which the 1-alk-1-enyl group contains 16 carbons and no additional double bonds while the 2-acyl group contains 18 carbons and 3 double bonds.


ecgoninium methyl ester(1+)

The conjugate acid of ecgonine methyl ester arising from protonation of the tertiary amino group; major species at pH 7.3.


phosphatidylcholine 32:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 32 carbons in total with 2 double bonds.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 28 carbons and 0 double bonds.


A glycerophosphate compound having an alkyl substituent at the 2-position of the glycerol moiety and its phosphorus acid component esterified with choline.


MAGNOFLORINE

An aporphine alkaloid that is (S)-corytuberine in which the nitrogen has been quaternised by an additional methyl group.


A phosphatidylcholine 13:0 in which the acyl groups at positions 1 and 2 are specified as heptanoyl and hexanoyl respectively.


The conjugate acid of L-2-aminohexano-6-lactam; major species at pH 7.3.


A phosphatidylcholine 40:4 in which the two acyl substituents at positions 1 and 2 are specified as icosanoyl and arachidonoyl respectively.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 are 7Z-hexadecenoyl and 5Z,8Z,11Z,14Z-icosatetraenoyl respectively.


A phosphatidylcholine 34:2 in which the 1- and 2-acyl groups are specified as (9Z)-hexadecenoyl and (11Z)-octadecenoyl respectively.


phosphatidylcholine 34:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 34 carbons in total with 0 double bonds.


sphingomyelin 33:1

A sphingomyelin in which the total number of carbons in the sphingoid base (R1) and fatty acyl (R2) groups is 33 with 1 double bond.


An organic cation obtained by protonation of the secondary amino group of cobimetinib.


An ammonium ion resulting from the protonation of the amino group of sertraline.


A phosphatidylcholine 35:1 in which one acyl group has 17 carbons and is fully saturated while the other has 18 carbons and 1 double bond (position not specified).


lysophosphatidylcholine O-18:1/0:0

A lysophosphatidylcholine O-18:1 in which the alkyl group is located at position 1.


A phosphatidylcholine 38:1 in which the acyl groups at positions 1 and 2 are eicosanoyl and (9Z)-octadecenoyl respectively.


CGP 78608(1+)

An organic cation that is the conjugate acid of CGP 78608, arising from  protonation of the secondary amino function.


A sphingomyelin 38:2 in which the ceramide N-acyl group is specified as icosadienoyl.


A 1,2-diacyl-sn-glycero-3-phosphocholine having a dodecanoyl group at the 1-position and a pentacosanoyl group at the 2-position.


A phosphatidylcholine 40:1 in which the acyl groups specified at positions 1 and 2 are (11Z)-octadecenoyl and docosanoyl respectively.


The trialkylammonium ion resulting from the protonation of the amino group of neopinone.


An organic cation obtained by deprotonation of the tertiary amino group of festuclavine; major species at pH 7.3.


An ammonium ion resulting from the protonation of the tertiary amino group of AZD1979.  A melanin concentrating hormone receptor 1 (MCHr1) antagonist.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 22 carbons and 2 double bonds.


methylated tertiary amine

A quaternary ammonium ion obtained by methylation of any tertiary amine


lysophosphatidylcholine (20:3/0:0)

A lysophosphatidylcholine 20:3 in which the acyl group is located at position 1.


A sphingomyelin in which the sphingoid component is specified as 4-hydroxy-15-methylhexadecasphinganine.


A phosphatidylcholine 32:2 in which the acyl group at both positions 1 and 2 is (9E)-hexadecenoyl respectively.


phosphatidylcholine 36:4

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 36 carbons in total with 4 double bonds.


A phosphatidylcholine 36:4  in which the acyl groups specified at positions 1 and 2 are (9Z)-octadecenoyl and (9Z,12Z,15Z)-octadecatrienoyl respectively.


phosphatidylcholine (16:0/20:5)

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the 1-acyl group contains 16 carbons and is fully saturated while the 2-acyl group contains 20 carbons and 5 double bonds.


lysophosphatidylcholine 17:2

A lysophosphatidylcholine in which the remaining acyl group (position unspecified) contains 17 carbons and 2 double bonds.


An organic cation that is the conjugate acid of 13-dihydrodaunorubicin, obtained by protonation of the primary amino function.


An anthracyline cation that is the conjugate acid of 13-deoxycarminomycin, obtained by protonation of the amino group. Major microspecies at pH 7.3


An organic cation that is the conjugate acid of macrocin, obtained by protonation of the tertiary amino group; major species at pH 7.3.


An ammonium ion that is the conjugate acid of sphingosylphosphocholine, obtained by protonation of the amino group. Major species at pH 7.3.


A phosphatidylcholine 42:0 in which the acyl groups specified at positions 1 and 2 are docosanoyl and eicosanoyl respectively.


Conjugate acid of 2,4-diaminopentanoic acid having both nitrogens protonated and an anionic carboxy group.


dithiophosphatidylcholine

A dithioglycerophosphocholine that is 1,2-dithioglycero-3-phosphocholine bearing two acyl substituents at positions 1 and 2.


An organic cation obtained by protonation of the secondary amino group of 4'-O-methylnorbelladine; major species at pH 7.3.


Deoxymethylsphingoid base

A cationic sphingoid obtained by the protonation of the amino group of any 1-deoxymethylsphingoid base.


lysophosphatidylcholine 26:1

A lysophosphatidylcholine in which the remaining acyl group (position not specified) contains 26 carbons and 1 double bond.


A 1-icosenoyl-sn-glycero-3-phosphocholine in which the the double bond of the icosenoyl group is at the 11-12 position and has Z configuration.


An organic cation that is the conjugate acid of terbinafine, obtained by protonation of the amino group; major species at pH 7.3.


phosphatidylcholine (16:1/22:6)

A phosphatidylcholine 38:7 in which the fatty acyl groups at positions 1 and 2 are specified as C16:1 and C22:6 respectively.


phosphatidylcholine 37:5

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 37 carbons in total with 5 double bonds.


phosphatidylcholine 29:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and contain a total of 29 carbons and no double bonds.


sphingomyelin 32:1

A sphingomyelin in which the total number of carbons in the sphingoid base (R1) and fatty acyl (R2) groups is 32 with 1 double bond.


An organic cation that is the conjugate acid of indacaterol, obtained by protonation of the secondary amino group.


The ammonium ion resulting from the protonation of the side-chain amino group of carteolol.


An ammonium ion resulting from the protonation of the amino group of (R)-1-phenylethanamine; major microspecies at pH 7.3.


D-prolinium

An optically active form of prolinium having D-configuration.


sphingomyelin 36:4

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 36 with 4 double bonds.


phosphatidylcholine O-38:3

A glycerophosphocholine that is an alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 38 carbons and 3 double bonds.


phosphatidylcholine 34:4

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 34 carbons in total with 4 double bonds.


phosphatidylcholine 36:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 36 carbons in total with 1 double bond.


Se-methyl-D-selenomethionine

A Se-methylselenomethionine that has D-configuration.


A ceramide obtained by formal condensation of the carboxy group of hexacosanoic acid with the amino group of 14-methylhexadecasphingosine-1-phosphocholine. It is a metabolite of the nematode Caenorhabditis elegans.


TETRAPROPYLAMMONIUM

A quarternary ammonium cation with four propyl substituents around the central nitrogen.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 17 carbons and 4 double bonds and is 2-hydroxylated.


L-tryptophanium

The L-enantiomer of tryptophanium.


The L-enantiomer of lysinium(2+).


An organic cation that is the conjugate acid of L-histidinal, arising from protonation of the amino group; major species at pH 7.3.


tiquizium

A member of the class of quinolizines that is trans-5-methyloctahydro-2H-quinolizinium which is substituted by a di(thiophen-2-yl)methylidene group at position 3. Its bromide salt is used as an antispasmodic drug.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the 1-acyl group is specified as palmitoyl while the acyl group (R) at position 2 is octadecadienoyl with the two double bonds at unspecified positions.


ethylaminium

An ammonium ion resulting from the protonation of the nitrogen of ethylamine. The conjugate acid of ethylamine; major species at pH 7.3.


sphingomyelin 44:4

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 44 with 4 double bonds.


Major microspecies at pH 7.3.


glutaminium

An alpha-amino-acid cation that is the conjugate acid of glutamine, arising from protonation of the amino group.


The L-enantiomer of ornithinium(2+).


A 1-palmitoyl-2-acyl-sn-glycero-3-phosphocholine in which the 2-acyl group is specified as 9-hydroxynonanoyl.


A secondary ammonium ion that is the conjugate acid of (S)-norreticuline, resulting from the protonation of the secondary amino group. The major species at pH 7.3.


mycinamicin III(1+)

A mycinamicin cation that is the conjugate acid of mycinamicin III, obtained by protnation of the tertiary amino group.


A 2-acyl-sn-glycero-3-phosphocholine in which the acyl group at position 2 is specified as acetyl.


A phosphatidylcholine 35:5 in which the acyl groups at positions 1 and 2 are specified as pentadecenoyl and icosatetraenoyl respectively.


A primary ammonium ion that is the conjugate acid of 4-aminobenzoic acid resulting from the protonation of the amino group.


diethylammonium

A secondary aliphatic ammonium ion resulting from the protonation of the amino group of diethylamine.


A phosphatidylcholine O-38:0 in which the alkyl and acyl groups (located at positions 1 and 2 respectively) are octadecyl and icosanoyl.


lysophosphatidylcholine 16:1

An lysophosphatidylcholine in which the acyl group is hexadecenoyl (position of double bond not specified). If R1 is hexadecenoyl and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is hexadecenoyl then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


A phosphatidylcholine 40:2 in which the acyl groups specified at positions 1 and 2 are eicosanoyl and (11Z,14Z)-eicosadienoyl respectively.


L-leucinium

The L-enantiomer of leucinium.


lysophosphatidylcholine 20:1

A lysophosphatidylcholine in which the remaining acyl group contains 20 carbons and 1 double bond. If R1 is the acyl group and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is the acyl group then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


A phosphatidylcholine 30:0 in which the phosphatidyl acyl groups at positions 1 and 2 are palmitoyl (hexadecanoyl) and myristoyl (tetradecanoyl) respectively.


A primary ammonium ion that is the conjugate acid of 6-hydroxy-pseudooxy-nornicotine resulting from the protonation of the primary amino group; major microspecies at pH 7.3.


A phosphatidylcholine 32:2 in which both phosphatidyl acyl groups are specified as palmitoleoyl.


An organic cation obtained by protonation of the tertiary amino function of sumatriptan.


An organic cation obtained by protonation of the secondary amino group of acarbose; major species at pH 7.3.


aclacinomycin Y(1+)

An anthracycline cation that is the conjugate acid of aclacinomycin Y, obtained by protonation of the tertiary amino group.


beta-alaninium amide

Conjugate acid of beta-alaninamide arising from protonation of the beta-amino group.


A phosphatidylcholine O-30:1 in which the alkyl and acyl groups specified at positions 1 and 2 are tetradecyl and (9Z)-hexadecenoyl respectively.


An organic cation obtained by protonation of the secondary amino function of levobunolol.


phosphatidylcholine (18:2/22:6)

A phosphatidylcholine 40:8 in which the fatty acyl groups at positions 1 and 2 are specified as C18:2 and C22:6 respectively.


An ammonium ion resulting from the protonation of the amino group of 2-{[(4-methoxybenzyl)(methyl)amino]methyl}-2-methylpropane-1,3-diol.


L-selenocysteinium

A selenocysteinium that has L configuration.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 20 carbons and 0 double bonds.


A phosphatidylcholine 24:0 in which the acyl groups at positions 1 and 2 are specified as lauroyl (dodecanoyl).


An anthracyline cation that is the conjugate acid of carminomycin, obtained by protonation of the amino group.


phosphatidylcholine 36:6

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 36 carbons in total with 6 double bonds.


phosphatidylcholine (16:0/20:4)

A phosphatidylcholine 36:4 in which the fatty acyl groups at positions 1 and 2 are specified as C16:0 and C20:4 respectively.


A phosphatidylcholine 42:1 in which the acyl groups specified at positions 1 and 2 are (9Z)-octadecenoyl and tetracosanoyl respectively.


A sphingomyelin obtained by formal condensation of the carboxy group of octadecanoic acid with the amino group of 15-methylhexadecasphingosine-1-phosphocholine. It is a metabolite of the nematode Caenorhabditis elegans.


A N-acylsphinganine-1-phosphocholine in which the acyl group specified is heptadecanoyl.


The D-enantiomer of lysinium(2+).


An organic cation that is the conjugate acid of 3-hydroxyquinine, formed via protonation of the tertiary amino group; major species at pH 7.3.


phosphatidylcholine 39:5

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 39 carbons in total with 5 double bonds.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two phosphatidyl acyl groups each contain 20 carbons and 5 double bonds.


sphingomyelin 16:0

A sphingomyelin in which the total number of carbons contained in the sphingoid base and fatty acyl groups is 16 with zero double bonds.


phosphatidylcholine 39:6

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 39 carbons in total with 6 double bonds.


A sphingomyelin in which the sphingoid component is specified as 4-hydroxyheptadecasphinganine.


A phosphatidylcholine 36:1 in which the acyl groups aspecified at positions 1 and 2 are octadecanoyl and octadecenoyl (double bond at unspecified position) respectively.


An ammonium ion obtained by the protonation of all four amino groups of spermine.


An organic cation that is the conjugate acid of queuine, obtained by protonation of the secondary amino group; major species at pH 7.3.


A monoalkylglycerophosphocholine that is sn-glycero-3-phosphocholine in which the alkyl group is located at position 2.


phosphatidylcholine 46:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 46 carbons in total with 1 double bond.


A phosphatidylcholine 42:1 in which the acyl groups specified at positions 1 and 2 are tetracosanoyl and (9Z)-octadecenoyl respectively.


A sphingomyelin 41:1 obtained by formal condensation of the carboxy group of tetracosanoic acid with the amino group of 15-methylhexadecasphingosine-1-phosphocholine. It is a metabolite of the nematode Caenorhabditis elegans.


A 1-[6-carboxy-8-(2,4-difluorophenyl)-3-fluoro-5-oxo-5,8-dihydro-1,8-naphthyridin-2-yl]pyrrolidin-3-aminium having S configuration.


A sphingomyelin 36:2 obtained by formal condensation of the carboxy group of any heptadecenoic acid with the amino group of nonadecasphingosine-1-phosphocholine.


L-homoserine lactone(1+)

An ammonium ion resulting from the protonation of the amino group of L-homoserine lactone. The major species at pH 7.3.


phosphatidylcholine (18:0/22:3)

A phosphatidylcholine 40:3 in which the fatty acyl groups at positions 1 and 2 are specified as C18:0 and C22:3 respectively.


phosphatidylcholine (16:0/23:5)

A phosphatidylcholine 39:5 in which the fatty acyl groups at positions 1 and 2 are specified as C16:0 and C23:5 respectively.


A piperidinium ion that results from the protonation of both of the nitrogen atoms of anileridine.


TETRAMETHYLAMMONIUM ION

The simplest quaternary ammonium cation, comprising a central nitrogen linked to four methyl groups.


A dithiophosphatidylcholine that is sn-dithiophosphatidylcholine in which the acyl substituents at S-1 and S-2 are both heptanoyl.


A 1-alkyl-sn-glycero-3-phosphocholine in which the alkyl group is specified as dodecyl.


A 1,2-diacyl-sn-glycero 3-phosphocholine in which the acyl group at position 1 is unspecified while that at position 2 is specified as oleoyl


N(3')-acetylgentamycin C(4+)

An organic cation obtained by protonation of the four amino groups of any N(3')-acetylgentamicin C.


An lysophosphatidylcholine derived from epoxidation across the double bond of 1-O-oleoyl-sn-glycero-3-phosphocholine.


phosphatidylcholine 38:8

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 38 carbons and 8 double bonds.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 19 carbons and 4 double bonds and is 2-hydroxylated.


A primary aliphatic ammonium ion that is the conjugate acid of 2-hexanamine resulting from the protonation of the amino group; Major species at pH 7.3.


A A 1,2-diacyl-sn-glycero-3-phosphocholine(1+) that is the dilauroyl diester of phosphatidiylcholine.


A quaternary ammonium ion that is a deacylated sphingomyelin with undefined sphingoid base.


A proton-exchange tautomer of 3-hydroxy-N(6),N(6),N(6)-trimethyl-L-lysine having an anionic carboxy group and a protonated amino group.


BETAINE

A quaternary ammonium ion in which the substituents on nitrogen are methyl (three) and carboxymethyl.


phosphatidylcholine 31:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 31 carbons and no double bonds.


A phosphatidylcholine O-38:4 in which the alkyl and acyl groups specified at positions 1 and 2 are octadecyl and (5Z,8Z,11Z,14Z)-eicosatetraenoyl respectively.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 22 carbons and 0 double bonds.


phosphatidylcholine 15:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 15 carbons and no double bonds.


A  2-acyl-1-alkyl-sn-glycero-3-phosphocholine betaine where the alkyl and the acyl groups at position 1 and 2 are octadecyl and palmitoyl respectively.


phosphatidylcholine 42:7

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 42 carbons in total with 7 double bonds.


A phosphatidylcholine having an alpha-linolenoyl at sn-1 and a fatty acyl chain of unknown composition at sn-2. Major species at pH 7.3.


trypanothione disulfide(1+)

Conjugate acid of trypanothione disulfide.


phosphatidylcholine (18:1/22:5)

A phosphatidylcholine 40:6 in which the fatty acyl groups at positions 1 and 2 are specified as C18:1 and C22:5 respectively.


3''-deamino-3''-hydroxykanamycin C(3+)

An organic cation obtained by protonation of the primary amino groups of 3''-deamino-3''-hydroxykanamycin C.


Ro 25-6981(1+)

A piperidinium ion resulting from the protonation of the piperidine nitrogen of Ro 25-6981; major species at pH 7.3.


phosphatidylcholine 38:5

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 38 carbons in total with 5 double bonds.


A 1,2-di-octadecadienoyl-sn-glycero-3-phosphocholine in which the double bonds in each fatty acyl group are at positions 9 and 12 and have Z configuration.


A phosphatidylcholine 40:1 in which the acyl groups specified at positions 1 and 2 are hexadecanoyl and (15Z)-tetracosenoyl respectively.


lysophosphatidylcholine 20:2

A lysophosphatidylcholine in which the remaining acyl group contains 20 carbons and 2 double bonds. If R1 is the acyl group and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is the acyl group then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


A phosphatidylcholine 32:1 in which the acyl groups at C-1 and C-2 are hexadecanoyl and (9Z)-hexadec-9-enoyl respectively.


A cationic sphingoid that is the conjugate acid of 3-dehydrotetradecasphinganine, obtained by protonation of the primary amino function; major species at pH 7.3.


An organic cation that is the conjugate acid of 5-O-mycaminosyltylonolide, obtained by protonation of the tertiary amino group; major species at pH 7.3.


arylmethylammonium

A primary ammonium ion obtained by protonation of the amino group of an arylmethylamine; major species at pH 7.3.


A phosphatidylcholine O-38:6 in which the alkyl and acyl groups specified at positions 1 and 2 are hexadecyl and (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl respectively.


A phosphatidylcholine O-34:1 in which the alkenyl group at position 1 is (9Z)-octadecenyl and the acyl group at position 2 is hexadecanoyl.


An organic cation obtained by protonation of the secondary amino function of phenylephrine.


phosphatidylcholine P-34:4

A 1-O-(alk-1-enyl)-2-O-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups at positions 1 and 2 contain 34 carbon atoms in total with 4 additional double bonds.


lysophosphatidylcholine 17:0

An  lysophosphatidylcholine in which the acyl group contains seventeen carbons and no double bonds. If R1 is an acyl group and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphoethanolaminecholine. If R1 is a hydrogen and R2 is an acyl group then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.