sphingomyelin 18:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 18 with 1 double bond.


Paz-PC

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


phosphatidylcholine O-33:2

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


validoxylamine B(1+)

A secondary ammonium ion resulting from the protonation of the amino group of validoxylamine B; major species at pH 7.3.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 are 7Z-hexadecenoyl and 4Z,7Z,10Z,13Z,16Z,19Z-docosahexaenoyl respectively.


sphingomyelin 34:3

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 34 with 3 double bonds.


phosphatidylcholine O-42:6

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 42 carbons and 6 double bonds.


methioninium

A sulfur-containing amino-acid cation that is the conjugate acid of methionine, arising from protonation of the amino group.


phosphatidylcholine 44:4

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 4 double bonds.


sphingomyelin 38:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 38 with 2 double bonds.


N(6')-acetylkanamycin B(4+)

A quadruply-charged ammonium ion arising from protonation of the four free amino groups of N(6')-acetylkanamycin; major species at pH 7.3.


(R)-SKF 38393(1+)

An organic cation obtained by protonation of the secondary amino function of (R)-SKF 38393.


An N-hydroxyhexadecenoylsphingosine-1-phosphocholine in which the N-acyl group is specified as (9Z)-3-hydroxyhexadec-9-enoyl.


A glycoside that is beta-D-Gal-(1->4)-[beta-D-Gal-(1->4)-beta-D-Glc-(1->6)]-beta-D-GlcNAc in which the hydroxy group at the reducing-end anomeric centre is replaced by a 3-azaniumylpropyl group.


aculene A(1+)

A secondary ammonium ion that is the conjugate acid of aculene A, arising from the protonation of the pyrrolidine nitrogen. Major species at pH 7.3.


An alpha-amino-acid cation that is the conjugate acid of 3-amino-L-alanine.


lysophosphatidylcholine (18:1/0:0)

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


A cationic sphingoid obtained by the protonation of the amino group of 1-deoxy-3-dehydrosphinganine; major species at pH 7.3.


An alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino and guanidino groups of (3S)-3-hydroxy-L-arginine


A primary ammonium ion resulting from the protonation of the amino group of L-tyrosinal.


sphingomyelin 46:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 46 with 1 double bond.


sphingomyelin 44:3

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 44 with 3 double bonds.


An organic cation obtained by protonation of moxifloxacin.


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)-hexadecenoyl respectively.


lysophosphatidylcholine 16:3

A lysophosphatidylcholine in which the remaining acyl group (position unspecified) contains 16 carbons and 3 double bonds.


phosphatidylcholine (16:1/20:5)

A phosphatidylcholine 36:6 in which the fatty acyl groups at positions 1 and 2 are specified as C16:1 and C20:5 respectively.


Conjugate acid of gamma-L-glutamylputrescine.


A  1-O-acyl-sn-glycero-3-phosphocholine in which the  1-acyl group is (10Z)-heptadecenoyl.


A phosphatidylcholine 42:1 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (15Z)-tetracosenoyl respectively.


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


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


serinium

An alpha-amino-acid cation that is the conjugate acid of serine.


phosphatidylcholine 44:6

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 6 double bonds.


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


Tetracation of 3,3,3-tetramine.


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


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


fumigaclavine C(1+)

An ammonium ion obtained by the protonation of the tertiary amino group of fumigaclavine C; major species at pH 7.3.


sphingomyelin 12:0

A sphingomyelin in which the total number of carbons contained in the sphingoid base and fatty acyl groups is 12 with zero double bonds.


A glycerophosphocholine that consists of L-alpha-glycerophosphocholine carrying an unspecified alkyl substituent at position 1.


An organic cation obtained by protonation of one of the two free amino groups of 2-deoxystreptamine.


A 1-palmitoyl-2-acyl-sn-glycero-3-phosphocholine in which the 2-acyl group is specified as (11Z,14Z,17Z)-icosatrienoyl.


phosphatidylcholine (20:4/22:6)

A phosphatidylcholine 42:10 in which the fatty acyl groups at positions 1 and 2 are specified as C20:4 and C22:6 respectively.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 24 carbons and 0 double bonds.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 27 carbons and 0 double bonds.


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


phenylalaninium

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


phosphatidylcholine (17:0/20:3)

A phosphatidylcholine 37:3 in which the fatty acyl groups at positions 1 and 2 are specified as C17:0 and C20:3 respectively.


A phosphatidylcholine 36:2 in which the acyl group both at positions 1 and 2 is octadecenoyl with double bond at unspecified position.


A vinca alkaloid cation that is the conjugate acid of vindoline; major species at pH 7.3.


C16 phytosphingosine(1+)

A cationic sphingoid that is the conjugate acid of C16 phytosphingosine, obtained by protonation of the primary amino function; major species at pH 7.3.


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


arsonium ion

Arsonium, AsH4(+), and derivatives formed by substitution by univalent groups.


N(tele)-methylhistaminium

Conjugate acid of N(tele)-methylhistamine.


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


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 18 carbons and 2 double bonds.


An organic cation obtained by protonation of the secondary hydroxy group of olodaterol


alpha-amino acid ester(1+)

A primary ammonium ion obtained by protonation of the amino group of any alpha-amino acid ester; major species at pH 7.3.


hydroxytrimethylaminium

A methylated tertiary amine that is  trimethylammonium in which the hydrogen attached to the nitrogen is replaced by a hydroxy group.


phosphatidylcholine (20:0/20:5)

A phosphatidylcholine 40:5 in which the fatty acyl groups at positions 1 and 2 are specified as C20:0 and C20:5 respectively.


glycerophosphocholine

The glycerol phosphate ester of a phosphocholine. A nutrient with many different roles in human health.


A secondary ammonium ion derived from spectinomycin by protonation of the secondary amino group located between the two alcoholic hydroxy groups.


A phosphatidylcholine 32:1 in which one acyl group has 16 carbons and is fully saturated while the other has 16 carbons and 1 double bond (position not specified).


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


sphingomyelin 41:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 41 with 1 double bond.


lysophosphatidylcholine (0:0/18:3)

A lysophosphatidylcholine 18:3 in which the acyl group is located at position 2.


A 2-acyl-sn-glycero-3-phosphocholine in which the 2-acyl group contains 18 carbons and is fully saturated.


A quaternary ammonium ion obtained by methylation of the two tertiary amino groups of 1,1'-hexadecane-1,16-diyldipyrrolidine.


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


phosphatidylcholine 35:5

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 5 double bonds.


phosphatidylcholine O-32:0

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 32 carbons and 0 double bond.


A phosphatidylcholine 40:5 in which the acyl groups specified at positions 1 and 2 are (9Z)-octadecenoyl and (7Z,10Z,13Z,16Z)-docosatetraenoyl respectively.


triethylammonium ion

An organoammonium cation having three ethyl substituents on the nitrogen atom.


A phosphatidylcholine 34:4 in which teh acyl groups specified at positions 1 and 2 are tetradecanoyl and (5Z,8Z,11Z,14Z)-eicosatetraenoyl respectively.


dimethylaminium

An organic cation that is the conjugate acid of dimethylamine; major species at pH 7.3.


A sphingomyelin d18:1 in which the N-acyl group is specified as tetradecanoyl (myristoyl).


A phosphatidylcholine 42:10 in which one acyl group has 20 carbons and 4 double bonds while the other has 22 carbons and 6 double bonds (position not specified).


lysophosphatidylcholine 20:4

An acyl-sn-glycero-3-phosphocholine in which the remaining acyl group (position not specified) contains 20 carbons with 4 double bonds.


A phosphatidylcholine that is a glycerol phosphatide (phosphoglyceride, glycerophospholipid) in which the hydroxy group of choline is esterified with the phosphate group of phosphatidic acid.


The conjugate acid of (S)-6-hydroxynicotine; major species at pH 7.3.


An alpha-amino-acid cation that is the N(6)-trimethyl derivative of L-lysine.


anthracycline cation

An organic cation obtained by protonation of any anthracycline.


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


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


phenylethanolaminium

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


thioetheramide PC

A member of the class of 1-thio-sn-glycero-3-phosphocholines that is (2S)-2-amino-3-sulfanylpropyl 2-(trimethylazaniumyl)ethyl phosphate in which the amino group is substituted by a palmitoyl group and the thiol is substituted by a palmityl group. It is a reversible inhibitor of secretory phospholipase A2.


An organic cation that is the conjugate acid of bulbocapnine, obtained by 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 stearoyl and oleoyl respectively.


phosphatidylcholine (P-38:4)

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 38 carbon atoms in total with 4 additional double bonds in the acyl moiety.


atropinium

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


aclidinium

A carboxylic ester obtained by formal condensation between the carboxy group of 2-hydroxy(di-2-thienyl)acetic acid and the hydroxy group of N-(3-phenoxypropyl)-3-quinuclidinol. Used as its bromide salt for the long-term maintenance treatment of bronchospasm associated with chronic obstructive pulmonary disease (COPD).


methyltrioctylammonium

A quaternary ammonium ion with three octyl groups and one methyl group attached to the nitrogen.


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


phosphatidylcholine (18:2/20:5)

A phosphatidylcholine 38:7 in which the fatty acyl groups at positions 1 and 2 are specified as C18:2 and C20:5 respectively.


sphingomyelin 40:0

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 40 with 0 double bonds.


phosphatidylcholine (14:0/18:3)

A phosphatidylcholine 32:3 in which the fatty acyl groups at positions 1 and 2 are specified as C14:0 and C18:3 respectively.


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


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


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


lysophosphatidylcholine (18:2/0:0)

A lysophosphatidylcholine 18:2 in which the acyl group is located at position 1.


phosphatidylcholine 28:0

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 0 double bonds.


A phosphatidylcholine 36:3 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (6Z,9Z,12Z)-octadecatrienoyl respectively.


phosphatidylcholine (0:0/20:1)

A 2-acyl-sn-glycero-3-phosphocholine which carries a monounsaturated 20 carbon fatty acyl group at position 2. The position of unsaturation is unspecified.


rocuronium

A 5alpha-androstane compound having 3alpha-hydroxy-, 17beta-acetoxy-, 2beta-morpholino- and 16beta-N-allyllyrrolidinium substituents.


Benzamide substituted on nitrogen by a 2-hydroxyethyl group and at the 4-position by an (N-methylpiperidinio)methyl group.


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 docosahexaenoyl respectively.


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


A  phosphatidylcholine 33:1 in which the acyl groups specified at positions 1 and 2 are palmitoyl and (9Z)-heptadecenoyl respectively.


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 (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl respectively.


lysophosphatidylcholine 19:0

A lysophosphatidylcholine in which the acyl group has a fully saturated C19 chain and is attached to the glycero moiety at either position 1 or 2.


7,8-diaminononanoate cation

Conjugate acid of 7,8-diaminononanoic acid.


prolinium

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


A phosphatidylcholine 34:2 in which one acyl group has 16 carbons and 1 double bond while the other has 18 carbons and 1 double bond (position not specified).


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


An organic cation obtained by protonation of the amino groups of (1S,2S,3R,5S)-3,5-diaminocyclohexane-1,2-diol


An organic cation that is the conjugate acid of (S,S)-asenapine, obtained by protonation of the tertiary amino group.


sphingomyelin 28:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 28 with 1 double bond.


diphthamide zwitterion

A zwitterionic tautomer of diphthamide having an anionic carboxy group and a protonated primary amino group.


staurosporinium

Conjugate acid of staurosporine.


An organic cation obtained via protonation of the secondary amino function of (1S,2R)-5-methoxy-1-methyl-2-(propylamino)tetralin.


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


An organic cation obtained by protonation of the exocyclic amino group of 5-aminomethyl-2-thiouridine.


Se-methyl-D-selenocysteinium

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


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


trospium

A carboxylic ester resulting from the formal condensation of the carboxy group of hydroxy(diphenyl)acetic acid with the hydroxy group of (1S,3R,5R)-3-hydroxy-8lambda(5)-azaspiro[bicyclo[3.2.1]octane-8,1'-pyrrolidin]-8-ylium. Its chloride salt is used to treat overactive bladder.


An ammonium ion resulting from the protonation of both of the tertiary amino groups of pipamperone.


NK13650 A

Major microspecies at pH 7.3.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups specified at positions 1 and 2 are palmitoyl and (11Z,14Z)-eicosadienoyl respectively.


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


bethanechol

The carbamic acid ester of 2-methylcholine. A slowly hydrolysed muscarinic agonist with no nicotinic effects, it is used as its chloride salt to increase smooth muscle tone, as in the gastrointestinal tract following abdominal surgery, treatment of gastro-oesophageal reflux disease, and as an alternative to catheterisation in the treatment of non-obstructive urinary retention.


lysophosphatidylcholine (P-16:0/0:0)

A 1-O-(alk-1-enyl)-sn-glycero-3-phosphocholine in which the alk-1-enyl group contains 16 carbons and no additional double bonds.


An ammonium ion resulting from the protonation of the primary amino group of N-acetylcadaverine. The major microspecies at pH 7.3.


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


A phosphatidylcholine 32:3 in which the acyl groups at positions 1 and 2 are tetradecanoyl and (9Z,12Z,15Z)-octadecatrienoyl respectively.


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


An ammonium ion resulting from the addition of a proton to the piperazine nitrogen that is not attached to the pyrimidinyl group. The major species at pH 7.3.


The conjugate acid of 2,5-diaminohexanoic acid resulting from protonation of both amino groups and deprotonation of the carboxy group; major species at pH 7.3.


sphingomyelin 28:4

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 28 with 4 double bonds.


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


An ammonium betaine formed by deprotonation of the phosphoric acid group of 6-(O-phosphocholine)hydroxyhexanoic acid.


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


phosphatidylcholine P-34:1

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


lysophosphatidylcholine 15:2

A lysophosphatidylcholine in which the remaining acyl group (position unspecified) contains 15 carbons and 2 double bonds.


An ammonium ion resulting from the protonation of the dimethyl-substituted amino group of clomipramine.


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


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


A phosphatidylcholine O-42:4 in which the alkyl and acyl group specified at positions 1 and 2 are icosyl and (7Z,10Z,13Z,16Z)-docosatetraenoyl respectively.


Conjugate acid of N(5)-[(hydroxyamino)(imino)methyl]-L-ornithine having an anionic carboxy group and protonated amiino and guanidino groups. It is the principal microspecies present at pH 7.3.


sphingomyelin 28:3

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 28 with 3 double bonds.


echothiophate

The phosphorothioate obtained by formal condensation of diethyl phosphate with N,N,N-trimethyl-2-sulfanylethanaminium. An irreversible acetylcholinesterase inhibitor, its iodide salt is used an ocular antihypertensive in the treatment of open-angle glaucoma, particularly when other drugs have proved inadequate.


An acyl-sn-glycero-3-phosphocholine in which the acyl group (with no specified position) is alpha-linolenoyl. Formula:C26H48NO7P.


phosphatidylcholine 30:0

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 0 double bonds.


phosphatidylcholine (18:1/22:1)

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


A 1-acyl-sn-glycero-3-phosphocholine in which the 1-acyl group contains 18 carbons and is fully saturated.


A phosphatidylcholine 38:5 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoyl respectively.


lysophosphatidylcholine O-18:0

A monoalkyl-sn-glycero-3-phosphocholine in which the alkyl group contains 18 carbons and no double bonds.


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


A primary ammonium ion resulting from the protonation of the amino group of alpha-aminopropionitrile.


A cationic sphingoid obtained by protonation of the amino group of sphinganine.


In nature, p-octopamine is believed to exist in only one stereoisomeric form, the L- or [R-(-)] form.


Major species at pH 7.3


cyclohexylammonium

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


N-methyl-alpha-berbine

A quaternary ammonium ion resulting from the methylation of the nitrogen atom of alpha-berbine.


A sphingomyelin 38:1 obtained by formal condensation of the carboxy group of henicosanoic acid with the amino group of 14-methylhexadecasphingosine-1-phosphocholine. It is a metabolite of the nematode Caenorhabditis elegans.


phosphatidylcholine O-36:6

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 36 carbons and 6 double bonds.


A phosphatidylcholine 38:2 which carries an icosanoyl group at position 1 and a (6Z,9Z)-18-oxooctadeca-6,9-dien-18-yl group at position 2.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 16 carbons and 0 double bonds.


An ammonium ion that results from the protonation of both of the nitrogens of buclizine.


phosphatidylcholine 38:0

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 0 double bonds.


monothioglycerophosphocholine

A monothioglycerol phosphate ester of a phosphocholine.


6'''-oxoneomycin C(5+)

An organic cation obtained by protonation of all five free amino groups of 6'''-oxoneomycin C; major species at pH 7.3.


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


A glycerophosphocholine that is sn-glycero-3-phosphocholine bearing a single alk-1-enyl substituent at an unspecified position.


lysophosphatidylcholine 18:1

A lysophosphatidylcholine in which the remaining acyl group (position not specified) contains 18 carbons with 1 double bond.


phosphatidylcholine (18:0/18:2)

A phosphatidylcholine 36:2 in which the fatty acyl groups at positions 1 and 2 are specified as C18:0 and C18:2 respectively.


A phosphatidylcholine 40:1 in which the acyl groups specified at positions 1 and 2 are (9Z)-octadecenoyl and docosanoyl respectively.


A phosphatidylcholine 34:1 in which the two acyl substituents at positions 1 and 2 are specified as oleoyl and palmitoyl respectively.


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


phosphatidylcholine 29:1

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.


phosphatidylcholine (P-42:3)

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 42 carbon atoms in total with 3 additional double bonds in the acyl moiety.


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


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


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


sphingomyelin 41:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 41 with 2 double bonds.


An alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino and guanidino groups of L-enduracididine.


dimyristoylphosphatidylcholine

A phosphatidylcholine where the phosphatidyl acyl groups are specified as tetradecanoyl (myristoyl).


ammonium ion derivative

A derivative of ammonium, NH4(+), in which one (or more) of the hydrogens bonded to the nitrogen have been replaced with univalent organyl groups. The substituting carbon of the organyl group must not itself be directly attached to a heteroatom (thereby excluding protonated amides, hemiaminals, etc).


Major microspecies at pH 7.3.


A phosphatidylcholine O-36:2 in which the alkyl and acyl groups specified at positions 1 and 2 are hexadecyl and (11Z,14Z)-eicosadienoyl respectively.


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


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


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


phosphatidylcholine 38:7

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 7 double bonds.


phosphatidylcholine 31:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 31 carbons in total with 1 double bond.


ELAIDYLPHOSPHOCHOLINE

A phosphocholine that is the mono-1-elaidyl ester of phosphocholine


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


A phosphatidylcholine 42:4 in which the acyl groups specified at positions 1 and 2 are (6Z,9Z,12Z)-octadecatrienoyl and (15Z)-tetracosenoyl respectively.


phosphatidylcholine P-36:4

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 36 carbon atoms in total with 4 additional double bonds.


A phosphatidylcholine 34:3 in which the acyl groups specified at positions 1 and 2 are palmitoyl and (9Z,12Z,15Z)-octadecatrienoyl (alpha-linolenoyl) respectively.


phosphatidylcholine (18:2/20:4)

A phosphatidylcholine 38:6 in which the fatty acyl groups at positions 1 and 2 are specified as C18:2 and C20:4 respectively.


An alpha-amino-acid cation arising from deprotonation of the carboxy group and protonation of both amino groups of erythro-5-hydroxy-L-lysine; major species at pH 7.3.


kanamycin X(3+)

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


An organic cation obtained by protonation of the two amino groups of 3,3'-neotrehalosadiamine.


phosphatidylcholine O-45:1

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 45 carbons and 1 double bond.


lysophosphatidylcholine 18:2

A lysophosphatidylcholine in which the acyl group (position not specified) contains 18 carbons and 2 double bonds.


The conjugate acid of (R)-reticuline; major species at pH 7.3.


A N-octadecenolsphingosine-1-phosphocholine in which the acyl group specified is 9Z-octadecenoyl.


A phosphatidylcholine O-36:3 in which the alkyl and acyl groups specified at positions 1 and 2 are hexadecyl and (8Z,11Z,14Z)-eicosatrienoyl respectively.


A primary ammonium ion that is the conjugate acid of 4-methoxytyramine resulting from the protonation of the primary amino group; major microspecies at pH 7.3.


phosphatidylcholine O-36:5

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 36 carbons and 5 double bonds.


phosphatidylcholine (P-40:3)

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 40 carbon atoms in total with 3 additional double bonds in the acyl moiety.


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


phosphatidylcholine 22:4

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 22 carbons in total with 4 double bonds.


phosphatidylcholine 40:2

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 2 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 tetradecanoyl respectively.


A 1-O-alkyl-2-O-arachidonoyl-sn-glycero-3-phosphocholine where the alkyl group is specified as hexadecyl.


phosphatidylcholine O-44:3

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 44 carbons and 3 double bonds.


solasodine 3-beta-D-glucoside(1+)

A secondary ammonium ion resulting from the protonation of the amino group of solasodine 3-beta-D-glucoside. The major species at pH 7.3.


ZM 323881(1+)

An organic cation obtained by protonation of the secondary amino function of ZM 323881.


phosphatidylcholine 30:1

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 1 double bond.


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


An organic cation that is the conjugate acid of 6-O-methyldeacetylisoipecoside, arising from protonation of the secondary amino group; major species at pH 7.3


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


An ammonium ion resulting from the protonation of the non-acylated nitrogen of N(1),N(8)-bis(coumaroyl)-spermidine. The major species at pH 7.3.


A phosphatidylcholine 40:7 in which the acyl groups at C-1 and C-2 are (11Z)-octadecenoyl and (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl respectively.


mycinamicin IV(1+)

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


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


The D-enantiomer of histidinium(1+).


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


A phosphatidylcholine 38:6 in which the acyl groups specified at positions 1 and 2 are (9Z)-octadecenoyl and (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoyl respectively.


A phosphatidylcholine 38:4 in which the acyl groups at positions 1 and 2 are specified as oleoyl and (8Z,11Z,14Z)-icosatrienoyl respectively.


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


tembetarine

A quaternary ammonium ion obtained by methylation of the tertiary amino function of reticuline.


colfosceril palmitate

A 1,2-diacyl-sn-glycero-3-phosphocholine(1+) in which both acyl groups are palmitoyl.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 27 carbons and 0 double bonds.


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


An organic cation obtained by protonation of the four free amino groups and deprotonation of the phosphate OH groups of 5''-phosphoribostamycin; major species at pH 7.3.


sphingosylphosphorylcholine

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


An ammonium ion resulting from the protonation of the tertiary amino group of (-)-(R)-19-O-acetyltabersonine. The major species at pH 7.3.


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


dihydrochanoclavine-I aldehyde(1+)

A cationic ergot alkaloid that is the conjugate acid of dihydrochanoclavine-I aldehyde, obtained by protonation of the secondary amino group; major species at pH 7.3.


umeclidinium

A quaternary ammonium ion that is quinuclidine substituted at positions 1 and 4 by 2-(benzyloxy)ethyl and hydroxy(diphenyl)methyl groups respectively.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 24 carbons and 0 double bonds and is 2-hydroxylated.


sphingomyelin 45:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 45 with 1 double bond.


A phosphatidylcholine 42:1 in which the acyl groups specified at positions 1 and 2 are docosanoyl and (11Z)-eicosenoyl respectively.


lysophosphatidylcholine 6:0

A lysophosphatidylcholine in which the remaining acyl group is specified as hexanoyl (caproyl). 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 piperidine nitrogen of raloxifene. The major species at pH 7.3.


A lysophosphatidylcholine 16:0 in which the acyl group is specified as palmitoyl (hexadecanoyl) and is located at position 2.


An organic cation that is the conjugate acid of paroxetine, arising from protonation of the piperidine nitrogen.


A sphingomyelin d18:1 in which the N-acyl group is specified as (13Z)-docosenoyl.


Conjugate acid of (6S)-6-hydroxyhyoscyamine arising from protonation of the bridging tertiary amino function.


A sphingomyelin in which the total number of carbons in the fatty acyl group is 26 with 1 double bond.


2-dimethylammonioethyl chloride

An organic cation obtained by protonation of the tertiary amino function of 2-dimethylaminoethyl chloride.


Se-methyl-L-selenocysteinium

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


A primary ammonium ion derivative resulting from the protonation of the primary amino group of beta-D-glucosaminyl-(1->4)-N-acetyl-D-glucosamine. The major species at pH 7.3.


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


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


phosphatidylcholine O-40:1

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 1 double bond.


A phosphatidylcholine 36:3 in which the acyl group specified at positions 1 and 2 are hexadecanoyl and (8Z,11Z,14Z)-eicosatrienoyl respectively.


A sphingomyelin 33:1 obtained by formal condensation of the carboxy group of heptadecanoic acid with the amino group of hexadecasphingosine-1-phosphocholine.


The L-enantiomer of histidinium(1+).


phosphatidylcholine 36:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 36 carbons in total and 0 double bonds.


phosphatidylcholine (20:1/20:4)

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


(R)-tembetarine

A tembetarine obtained by methylation of the tertiary amino function of (R)-reticuline.


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


phosphatidylcholine 32:0

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 0 double bonds.


A 2-acyl-1-alkyl-sn-glycero-3-phosphocholine in which the acyl and alkyl groups are specified as hexadecanoyl (palmitoyl) and hexadecyl respectively.


Dication of N-methylputrescine arising from protonation of both amino groups; major species at pH 7.3.


phosphatidylcholine 25:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 25 carbons in total with no double bonds.


phosphatidylcholine 48:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 48 carbons in total with 2 double bonds.


A  phosphatidylcholine 38:1 in which the acyl groups specified at positions 1 and 2 are eicosanoyl and (11Z)-octadecenoyl respectively.


L-methioninium

The L-enantiomer of methioninium.


An N-acylhexadecasphingosine-1-phosphocholine in which the ceramide N-acyl group is specified as hexadecanoyl (palmitoyl).


name: N-(1,2-saturated very-long-chain fatty acyl)-(R)-4-hydroxysphingoid base


A phosphocholine carrying an O-(4-diazoniophenyl) substituent.


5-ammoniolevulinic acid

A primary ammonium ion obtained by protonation of the amino group of 5-aminolevulinic acid.


An organic cation that is the conjugate acid of 15-methylhexadecasphing-4-enine-1-phosphocholine, obtained by protonation of the primary amino function; major species at pH 7.3.


lysophosphatidylcholine 26:0

A lysophosphatidylcholine in which the remaining acyl group (position not specified) contains 26 carbons and 0 double bonds.


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


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


phosphatidylcholine 35:3

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 3 double bonds.


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


An organic cation obtained by protonation of the two amino groups of 2'-deamino-2'-hydroxy-6'-dehydroparomamine; major species at pH 7.3.


A 1-acyl-2-linoleoyl-sn-glycero-3-phosphocholine where the 1-O-acyl group is specified as palmitoyl and the linoleoyl group has (14)C labels at the C-1 position.


A phosphatidylcholine 38:5 in which the acyl groups at positions 1 and 2 are hexadecanoyl and (4Z,7Z,10Z,13Z,16Z)-docosapentaenoyl respectively.


A primary ammonium ion that is the conjugate acid of thiamine(1+) resulting from the protonation of the primary amino group.


A lysophosphatidylcholine 17:0 in which the acyl group at position 1 is 1-heptadecanoyl and the hydroxy group at position 2 is unsubstituted.


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


A phosphatidylcholine O-36:0 in which the alkyl and acyl groups specified at positions 1 and 2 are octadecyl and octadecanoyl respectively.


A N-hexadecenoylsphingosine-1-phosphocholine in which the amino group of sphingosine is in amide linkage with a 9Z-hexadecenoyl fatty acid.


NK13650 B

Major microspecies at pH 7.3.


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


Any lysoglycerophosphocholine having an oxidized fatty acyl chain at sn-2. Major species at pH 7.3.


A phosphatidylcholine 38:4 in which one acyl group has 16 carbons and is fully saturated while the other has 22 carbons and 4 double bonds (position not specified).


phosphatidylcholine 34:6

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 6 double bonds.


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


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


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


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups specified at positions 1 and 2 are palmitoyl and (11Z)-eicosenoyl respectively.


phosphatidylcholine (16:0/18:1)

A phosphatidylcholine 34:1 in which the fatty acyl groups at positions 1 and 2 are specified as C16:0 and C18:1 respectively.


phosphatidylcholine O-32:2

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 32 carbons and 2 double bonds.


A sphingomyelin 33:2 obtained by formal condensation of the carboxy group of pentadecanoic acid with the amino group of any sphingadienine-1-phosphocholine.


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


lysophosphatidylcholine (16:1/0:0)

A lysophosphatidylcholine 16:1 in which the acyl group is located at position 1.


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


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


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


desferrioxamine B(1+)

A primary aliphatic ammonium ion that is the conjugate acid of desferrioxamine B; major species at pH 7.3.


A sphingomyelin in which the total number of carbons in the fatty acyl group is 24 with 1 double bond.


A sphingomyelin 40:2 obtained by formal condensation of the carboxy group of docosanoic acid with the amino group of any sphingadienine-1-phosphocholine.


sphingomyelin d18:1/24:1

A sphingomyelin d18:1 in which the fatty acyl group contains 24 carbons and 1 double bond.


An organic cation obtained by protonation of the tertiary amino function of N-allyl-6-chloro-1-(3-methylphenyl)-2,3,4,5-tetrahydro-3-benzazepinium-7,8-diol.


4-O-phosphohygromycin B(1+)

The conjugate acid of 4-O-phosphohygromycin B having an anionic phosphate group and all three amino groups protonated; major species at pH 7.3.


An organic cation that is the conjugate base of (S)-norcoclaurine: major species at pH 7.3.


A phosphatidylcholine 36:0 where the acyl substituents at positions 1 and 2 are icosanoyl and palmitoyl respectively.


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


Conjugate base of 3alpha(S)-strictosidine arising from protonation of the secondary amino group; major species at pH 7.3.


lysophosphatidylcholine 20:3

A lysophosphatidylcholine in which the acyl group contains 20 carbons with 3 double bonds. If R1 is an 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 an acyl group then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


A phosphatidylcholine 40:6 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (9Z,11Z,13Z,15Z,17Z,19E)-docosahexaenoyl respectively.


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


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


A phosphatidylcholine 36:2 in which the phosphatidyl acyl groups at positions 1 and 2 are both oleoyl.


The organic cation formed by protonation of the amino group in 3'-N-debenzoyltaxol.  It is the major microspecies at pH 7.3.


phosphatidylcholine P-40:6

A 1-O-(alk-1-enyl)-2-O-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups contain a total of 40 carbon atoms with 6 additional double bonds.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and 2 are specified as (9Z)-hexadecenoyl and acetyl respectively.


gentamicin X2 cation (4+)

Major microspecies at pH 7.3.


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


A primary ammonium ion resulting from the protonation of the amino group of beta-D-galactosyl-(1<->1')-sphinganine; major species at pH 7.3.


An organic cation that is the conjugate acid of 2-{[(2E)-3-iodoprop-2-en-1-yl](propyl)ammonio}tetralin-7-ol, arising from protonation of the tertiary amino function.


A N-hexacosenoylsphingosine-1-phosphocholine consisting of sphingosine as the sphingoid base acylated at the N atom by a (17Z)-hexacosenoyl group.


An organic cation obtained by protonation of osimertinib.


Choline C-11

A choline in which one of the methyl carbons is replaced by an (11)C isotope. An intravenous radioactive diagnostic agent used (in the form of its chloride salt) as a tracer during positron emission tomography scans to help detect sites of recurrent prostate cancer.


phosphatidylcholine 32:3

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 3 double bonds.


sn-monothiophosphatidylcholine

A monothioglycerophosphocholine that is an sn-1- or -2-monothioglycero-3-phosphocholine bearing one or two acyl substituents at positions 1 and/or 2.


sphingomyelin d18:1/18:0

A sphingomyelin d18:1 in which the fatty acyl group contains 18 carbons and is fully saturated.


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 linoleoyl (9Z,12Z-octadecadienoyl) respectively.


A phosphatidylcholine 36:6 in which the acyl groups at positions 1 and 2 tetradecanoyl and (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl respectively.


phosphatidylcholine (14:0/18:2)

A phosphatidylcholine 32:2 in which the fatty acyl groups at positions 1 and 2 are specified as C14:0 and C18:2 respectively.


phosphatidylcholine O-40:4

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 4 double bonds.


sphingomyelin 24:1

A sphingomyelin in which the total number of carbons contained in the sphingoid base and fatty acyl groups is 24 with 1 double bond.


phosphatidylcholine 28:6

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 6 double bonds.


A 2-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.


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:144371 (and Fig. S10).


A phosphatidylcholine 38:4 in which the two acyl substituents at positions 1 and 2 are specified as stearoyl and arachidonoyl respectively.


A phosphatidylcholine 27:0 in which the acyl groups at positions 1 and 2 are specified as octadecanoyl and nonanoyl respectively.


An alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino groups of (4R)-4-hydroxy-L-lysine: major species at pH 7.3.


A glycerophosphocholine that is glycero-3-phosphocholine carrying unspecified alk-1-enyl and acyl groups at positions 1 and 2 respectively. Major species at pH 7.3.


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


A 2-alkyl-sn-glycero-3-phosphocholine in which the alkyl group is specified as hexadecyl.


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


phosphatidylcholine 32:6

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 6 double bonds.


phosphatidylcholine 13:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 13 carbons and no double bonds.


A  phosphatidylcholine 34:2 in which the acyl groups specified at positions 1 and 2 are (9Z,12Z)-octadecadienoyl and linoleoyl respectively.


C20 phytosphingosine(1+)

A cationic sphingoid that is the conjugate acid of C20 phytosphingosine, obtained by protonation of the primary amino function; major species at pH 7.3.


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


Dication of glutathionylspermidine arising from deprotonation of the terminal carboxy group and protonation of the primary and secondary amino groups; major species at pH 7.3.


A cationic sphingoid that is the conjugate acid of 4-hydroxysphing-8-enine, obtained by protonation of the primary amino function; major species at pH 7.3.


A phosphatidylcholine O-36:1 in which the alkyl and acyl groups specified at positions 1 and 2 are hexadecyl and (9Z)-eicosenoyl respectively.


A 1-O-acyl-sn-glycero-3-phosphocholine in which the acyl group is specified as pentadecanoyl.


A lysophosphatidylcholine 18:2 in which the acyl group at position 1 is (9Z,12Z)-octadecadienoyl.


An indole alkaloid cation that is the conjugate acid of (3R)-3-hydroxy-2,3-dihydrotabersonine, obtained by protonation of the tertiary amino group. Major species at pH 7.3.


A 1-O-acyl-sn-glycero-3-phosphocholine in which the acyl group is specified as icosanoyl.


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


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


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


phosphatidylcholine 42:6

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 6 double bonds.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 21 carbons and 0 double bonds and is 2-hydroxylated.


An N-acylsphinganine-1-phosphocholine in which the ceramide N-acyl group is specified as nonadecanoyl.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the 1- and 2-acyl groups are specified as hexadecanoyl and 9-oxononanoyl respectively.


lysophosphatidylcholine 19:1

A lysophosphatidylcholine in which the remaining acyl group (position unspecified) contains 19 carbons and 1 double bond.


A phosphatidylcholine 36:5 in which the acyl groups specified at positions 1 and 2 are hexadecanoyl and (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoyl respectively.


A phosphosphingolipid that is 15-methylhexadecasphing-4-enine substituted at position 1 by a phosphocholine moiety


An alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino and guanidino groups of (3S)-3-hydroxy-L-enduracididine.


A quaternary ammonium ion that is the conjugate acid of 3-dehydrocarnitine.


sphingomyelin 38:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 38 with 1 double bond.


A cationic sphingoid that is the conjugate acid of (4R)-hydroxysphing-(8Z)-enine, obtained by protonation of the primary amino function; major species at pH 7.3.


A 1-oleoyl-2-acyl-sn-glycero-3-phosphocholine in which the acyl substituent at position 2 is specified as acetyl.


A 1,2-diacyl-sn-glycero-3-phosphocholine(1+) in which the acyl groups at C-1 and C-2 are hexadecanoyl and 6-[(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino]hexanoyl respectively.


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


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 21 carbons and 4 double bonds and is 2-hydroxylated.


The ammonium ion that is the conjugate acid of clenbuterol, formed by protonation of the secondary amine nitrogen atom.


decamethonium

A quaternary ammonium ion that is a depolarising muscle relaxant whose structure comprises a decane-1,10-diamine core in which each amino group carries three methyl substituents.


phosphatidylcholine 44:5

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 5 double bonds.


A sphingomyelin 42:2 obtained by formal condensation of the carboxy group of tetracosanoic acid with the amino group of any sphingadienine-1-phosphocholine.


Conjugate acid of L-prolinamide.


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


phosphatidylcholine O-40:0

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 0 double bonds.


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


An ammonium ion resulting from the protonation of the non-formylated amino group of arformoterol.


An ammonium ion that is the conjugate acid of akuammicine, arising from the protonation of the tertiary amino group.


A phosphatidylcholine 32:2 in which the acyl groups specified at positions 1 and 2 are tetradecanoyl and (9Z,12Z)-octadecadienoyl respectively.


phosphatidylcholine (17:0/20:4)

A phosphatidylcholine 37:4 in which the fatty acyl groups at positions 1 and 2 are specified as C17:0 and C20:4 respectively.


An ammonium ion that results from the protonation of the dimethyl-substituted nitrogen of promethazine.


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


phosphatidylcholine 35:4

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 4 double bonds.


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


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and 2 are specified as hexadecanoyl and (5S,6E,8Z,11Z,14Z)-5-hydroxyicosa-6,8,11,14-tetraenoyl respectively.


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


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


phosphatidylcholine (16:1/18:1)

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


Conjugate acid of tabersonine arising from protonation of the tertiary amino group; major species at pH 7.3.


A phosphatidylcholine 36:5 in which the acyl groups specified at positions 1 and 2 are (9Z)-hexadecenoyl and (5Z,8Z,11Z,14Z)-eicosatetraenoyl respectively.


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


A primary ammonium ion that is the conjugate acid of garomefrine, obtained from the protonation of the primary amino group. Major microspecies at pH 7.3.


An organic cation that is the conjugate acid of 3-[4-(3-chlorophenyl)piperazin-1-yl]-1,1-diphenylpropan-2-ol, arising from selective protonation of one of the piperazine nitrogens.


A quaternary ammonium ion that is (13S,14R)-1,13-dihydroxy-N-methylcanadine in which the alcoholic hydroxy group at position 13 has been converted into the corresponding acetate ester.


sphingomyelin 44:0

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 44 with 0 double bonds.


An ammonium ion resulting from the protonation of the tertiary amino group of 15alpha-stemmadenine. The major species at pH 7.3.


A sphingomyelin 43:2 obtained by formal condensation of the carboxy group of any tetracosenoic acid with the amino group of nonadecasphingosine-1-phosphocholine.


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


phosphatidylcholine (16:0/22:6)

A phosphatidylcholine 38:6 in which the fatty acyl groups at positions 1 and 2 are specified as C16:0 and C22:6 respectively.


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-hydroxybutyl respectively.


C20 3-dehydrosphinganine(1+)

A cationic sphingoid that is the conjugate acid of C20 3-dehydrosphinganine, obtained by protonation of the primary amino function; major species at pH 7.3.


phosphatidylcholine P-34:3

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


A 1-(Z)-alk-1-enyl-sn-glycero-3-phosphocholine in which the alkenyl group is (1Z,9Z)-octadecadienyl.


phosphatidylcholine 26:2

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 26 carbons in total with 2 double bonds.


An ammonium ion that is a derivative of L-histidine having a 3-carboxy-3-(methylammonio)propyl group at the 2-position on the imidazole ring.


Major microspecies at pH 7.3.


sphingomyelin 22:0

A sphingomyelin in which the total number of carbons contained in the sphingoid base and fatty acyl groups is 22 with zero double bonds.


flutropium

A carboxylic ester resulting from the formal condensation of the carboxy group of hydroxy(diphenyl)acetic acid with the hydroxy group of (3-endo,8-syn)-8-(2-fluoroethyl)-3-hydroxy-8-methyl-8-azoniabicyclo[3.2.1]octane. Its bromide salt is used as a drug for the treatment asthma and chronic obstructive pulmonary disease.


phosphatidylcholine 35:2

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 2 double bonds.


C20 sphinganine(1+)

A cationic sphingoid obtained by protonation of the amino group of C20 sphinganine; major species at pH 7.3.


The alpha-amino-acid cation formed from carboxynorspermidine by zwitterion formation between the carboxy and alpha-amino groups and protonation of the nitrogen atoms at positions 5 and 9; the major structure of carboxynorspermidine at pH 7.3.


SB 224289(1+)

An organic cation that is the conjugate acid of SB 224289, arising from protonation of the tertiary amino function.


sphingomyelin 43:7

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 43 with 7 double bonds.


An alkylaminium that is the conjugate acid of pentan-1-amine resulting from the protonation of the primary amino group; Major species at pH 7.3.


Conjugate acid of N-(3-acetamidopropyl)-4-aminobutanal arising from deprotonation of the secondary amino function.


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


A phosphatidylcholine 24:0 in which the acyl groups specified at positions 1 and 2 are undecanoyl and tridecanoyl respectively.


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


A phosphatidylcholine 34:0 in which the two acyl substituents at positions 1 and 2 are specified as stearoyl and palmitoyl respectively.


kanamycin D(3+)

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


fumisoquin A(1+)

A primary ammonium ion that is the conjugate acid of fumisoquin A, obtained from the protonation of the amino group. Major microspecies at pH 7.3.


phosphatidylcholine 44:0

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.


sphingomyelin 44:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 44 with 1 double bond.


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


A sphingomyelin 39:1 obtained by formal condensation of the carboxy group of docosanoic acid with the amino group of 15-methylhexadecasphingosine-1-phosphocholine. It is a metabolite of the nematode Caenorhabditis elegans.


3''-deamino-3''-hydroxykanamycin X(2+)

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


arachidonoylcholine

An acylcholine obtained by formal condensation of the carboxy group of arachidonic acid with the hydroxy group of choline.


(S)-SKF 38393(1+)

An organic cation obtained by protonation of the secondary amino function of (S)-SKF 38393.


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


synephrinium

Conjugate acid of synephrine.


An organic cation that is the conjugate acid of 5-nonyloxytryptamine, arising from selective protonation of the primary amino function.


An organic cation obtained by protonation of the secondary amino function of 3-(methylaminomethyl)indole; major species at pH 7.3.


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


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


L-isoleucinium

The L-enantiomer of isoleucinium.


ammonioacetone

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


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


lysophosphatidylcholine O-17:0

A monoalkyl-sn-glycero-3-phosphocholine in which the alkyl group (position not specified) contains 17 carbons and is fully saturated.


An organic cation that is the conjugate acid of (R,R)-asenapine, obtained by protonation of the tertiary amino group.


lysophosphatidylcholine 14:1(9Z)/0:0

A lysophosphatidylcholine 14:1 in which the remaining acyl group is (9Z)-tetradecenoyl.


An organic cation obtained by protonation of the tertiary amino function of N-methyl-6-chloro-1-(3-methylphenyl)-2,3,4,5-tetrahydro-3-benzazepinium-7,8-diol.


A primary ammonium ion obtained by protonation of the primary amino function of pyroglutamine.


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 (S)-12-hydroxyoleoyl.


(R)-bethanechol

The (R)-enantiomer of bethanechol.


A lysophosphatidylcholine 18:1 in which the acyl group specified as position 1 is (11Z)-octadecenoyl.


The D-enantiomer of histidinium(2+).


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


isopropylaminium

Conjugate acid of isopropylamine.


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


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


A phosphatidylcholine O-40:6 in which the alkyl and the acyl groups at positions 1 and 2 are octadecyl and (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl respectively.


acylcholine

A choline ester formed from choline and a carboxylic acid.


D-serinium

The D-enantiomer of serinium.


An ammonium ion resulting from the protonation of the piperidinyl nitrogen of LY-310762.


Conjugate acid of 16-methoxytabersonine arising from protonation of the endocyclic tertiary amino group.


A phosphatidylcholine 28:0 in which the two acyl substituents at positions 1 and 2 are specified as lauroyl and palmitoyl respectively.


A sphingomyelind18:1 in which   the total number of carbons in the fatty acyl group is 26 with 2 double bonds.


An N-hydroxytetracosenoylsphingosine-1-phosphocholine in which the N-acyl group is specified as (15Z)-3-hydroxytetracos-15-enoyl.


two-alkyl ammonium ion

A primary amine protonated on nitrogen bound to carbon with two alkyl chains.


succinylcholine

A quaternary ammonium ion that is the bis-choline ester of succinic acid.


fumigaclavine B(1+)

An ammonium ion obtained by the protonation of the tertiary amino group of the fumigaclavine B; major species pH 7.3.


GR 127935(1+)

An organic cation obtained via selective monoprotonation of the piperazine ring of GR 127935.


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


name: 3,5,9-Trioxa-4-phosphapentacosan-1-aminium, 7-(acetyloxy)-4-hydroxy-N,N,N-trimethyl-10-oxo-, inner salt, 4-oxide


An organic cation obtained by protonation of alectinib.


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


A 1-O-acyl-sn-glycero-3-phosphocholine obtained by hydroxylation at position 8 of 1-O-oleoyl-sn-glycero-3-phosphocholine.


An ammonium ion resulting from the protonation of the nitrogen of the dimethylaminoethyl substituent of diltiazem. The major species at pH 7.3.


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


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


A phosphatidylcholine 26:0 in which the two acyl substituents at positions 1 and 2 are palmitoyl and decanoyl respectively.


A sphingomyelin 44:0  in which the N-acyl group and sphingoid base are specified as hexacosanoyl and sphinganine respectively.


phosphatidylcholine 33:2

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


phosphatidylcholine O-38:2

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 38 carbons and 2 double bonds.


phosphatidylcholine 44:1-OH

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 1 hydroxy group.


A sphingomyelin d18:1 in which the ceramide N-acyl group is specified as (11Z)-icosenoyl.


D-phenylalaninium

An optically active form of phenylalaninium having D-configuration.


An indole alkaloid cation that is the conjugate acid of (3R)-1,2-didehydro-3-hydroxy-16-methoxy-2,3-dihydrotabersonine, obtained by protonation of the tertiary amino group. Major species at pH 7.3.


D-isoleucinium

The D-enantiomer of isoleucinium.


phosphatidylcholine 37:3

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 3 double bonds.


The (R)-enantiomer of laudanine(1+).


A primary ammonium ion obtained by protonation of the primary amino function of indol-3-ylmethylamine; major species at pH 7.3.


phosphatidylcholine 36:5

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 5 double bonds.


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


An sn-glycero-3-phosphocholine compound having a palmitoyl substituent at the 1-hydroxy position


lysophosphatidylcholine 24:0

A lysophosphatidylcholine in which the remaining acyl group (position not specified) contains 24 carbons and 0 double bonds.


A 1-palmitoyl-2-acyl-sn-glycero-3-phosphocholine in which the 2-acyl group has 20 carbons and 3 double bonds.


A phosphatidylcholine 37:5 in which the acyl groups at positions 1 and 2 are specified as heptadecenoyl and icosatetraenoyl respectively.


dioleoyl phosphatidylcholine

A phosphatidylcholine in which the phosphatidyl acyl groups are both oleoyl.


A lysophosphatidylcholine 22:4 in which the acyl group is specified as (7Z,10Z,13Z,16Z)-docosatetraenoyl and is located at position 1.


An sn-monothiophosphatidylcholine in which the acyl substituents at O-1 and S-2 are hexadecyl and hetanoyl respectively; an analogue of diheptanoyl thio-PC that contains an ether-linked saturated C16 moiety at the sn-1 position rather than a heptanoyl thiol ester.


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


sphingomyelin d18:1/23:3

A sphingomyelin d18:1 in which the total number of carbons in the fatty acyl group is 23 with 3 double bonds.


hygromycin B(3+)

An ammonium ion that is the trication of hygromycin B arising from protonation of the three amino groups; major species at pH 7.3.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and 2 are pentadecanoyl and (5Z,8Z,11Z,14Z)-eicosatetraenoyl respectively.


A lysophosphatidylcholine 18:1 in which the acyl group is at position 1 is elaidoyl [(9E)-octadec-9-enoyl] and the hydoxy group at position 2 is unsubstituted.


A sphingomyelin 39:1 obtained by formal condensation of the carboxy group of docosanoic acid with the amino group of heptadecasphingosine-1-phosphocholine.


phosphatidylcholine (16:1/20:4)

A phosphatidylcholine 36:5 in which the fatty acyl groups at positions 1 and 2 are specified as C16:1 and C20:4 respectively.


Dication of N(1),N(12)-diacetylspermine.


A phosphatidylcholine 36:4 in which the acyl groups at positions 1 and 2 are octadecanoyl and (6Z,9Z,12Z,15Z)-octadecatetraenoyl respectively.


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


A sphingomyelin d18:1 in whihc the acyl group specified is nonadecanoyl.


A glycerophosphocholine that is glycero-3-phosphocholine carrying one alkyl and one acyl group in unspecified positions. Major species at pH 7.3.


(RS)-norcoclaurinium

conjugate acid of (RS)-norcoclaurine


A galactose phosphate consisting of N-acetyl-D-galactosamine having a choline phosphate group at the 6-position.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 24 carbons and 0 double bonds and is 2-hydroxylated.


Major microspecies at pH 7.3.


Major species at pH 7.3.


glycinium

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


phosphatidylcholine 24:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 24 carbons in total with 0 double bonds.


An alkane-alpha,omega-diammonium(2+) ion that is the doubly-charged ammonium ion, arising from protonation of both nitrogens of cadaverine. The major species at pH 7.3.


sphingomyelin 42:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 42 with 1 double bond.


A  phosphatidylcholine 30:0 in which the acyl group specified at positions 1 and 2 is pentadecanoyl.


gentamicin C(5+)

An organic cation obtained by protonation of the five amino groups of any gentamicin C.


An N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 17 carbons and 0 double bonds and is 2-hydroxylated.


phosphatidylcholine 15:1

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 15 carbons and 1 double bond.


A secondary ammonium ion that is the conjugate acid of  norsalsolinol arising from the protonation of the amino group; major species at pH 7.3.


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


An N-acylsphinganine-1-phosphocholine obtained by formal condensation of the carboxy group of any octadecenoic acid with the amino group of sphinganine-1-phosphocholine.


A phosphatidylcholine 36:2 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (2E,4E)-octadecadienoyl respectively.


erythromycin cation

An organic cation obtained by protonation of any erythromycin.


An N-acyl-15-methylhexadecasphing-4-enine-1-phosphocholine in which the acyl group has 24 carbons and 4 double bonds and is 2-hydroxylated.


phosphatidylcholine (18:1/22:6)

A phosphatidylcholine 40:7 in which the fatty acyl groups at positions 1 and 2 are specified as C18:1 and C22:6 respectively.


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


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


acetyl-beta-methylthiocholine

A quaternary ammonium ion that is the S-acetyl derivative of beta-methylthiocholine


lysophosphatidylcholine 24:1

A lysophosphatidylcholine in which the remaining acyl group (position not specified) contains 24 carbons and 1 double bond.


lysophosphatidylcholine 20:3/0:0

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


phosphatidylcholine (18:0/22:5)

A 1,2-diacyl-sn-glycero-3-phosphocholine in which one acyl group has 18 carbons and is fully saturated while the other has 22 carbons and 5 double bonds.


An indole alkaloid cation that is the conjugate acid of 3-hydroxy-16-methoxy-2,3-dihydrotabersonine, obtained by protonation of the tertiary amino function; major species at pH 7.3.


The tetracation of PoPo-1 dye.


A primary ammonium ion resulting from the protonation of the amino group of 2-aminopropan-1-ol; major species at pH 7.3.


An ammonium ion resulting from the protonation of the amino group of (2S,3S,5R,10R,12S,14S,15R,16R)-2-amino-12,16-dimethylicosane-3,5,10,14,15-pentol. Major species at pH 7.3.


phosphatidylcholine 42:11

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 42 carbons and 11 double bonds.


phosphatidylcholine 44:2-OH

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 1 hydroxy group.


An alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the two amino groups of 5-hydroxylysine.


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


A phosphatidylcholine 36:2 in which the acyl groups specified at positions 1 and 2 are octadecanoyl and (10Z,12Z)-octadecadienoyl respectively


phosphatidylcholine (22:4/22:6)

A phosphatidylcholine 44:10 in which the fatty acyl groups at positions 1 and 2 are specified as C22:4 and C22:6 respectively.


lysophosphatidylcholine P-18:1/0:0

A lysophosphatidylcholine P-18:1 in which the alkenyl group is located at position 1.


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


An organic cation obtained by protonation of the tertiary amino group of benzydamine. It is the major microspecies at pH 7.3 of benzydamine, which is a locally-acting nonsteroidal anti-inflammatory drug with additional local anaesthetic and analgesic properties.


A sphingomyelin 34:0 in which the N-acyl group and sphingoid base are specified as hexadecanoyl and phytosphingosine respectively.


lysophosphatidylcholine (0:0/18:1)

A lysophosphatidylcholine 18:1 in which the acyl group is located at position 2.


lysophosphatidylcholine 17:1

A lysophosphatidylcholine in which the remaining acyl group contains 17 carbons and 1 double bond. If R1 is acyl and R2 is a hydrogen then the molecule is a 1-acyl-sn-glycero-3-phosphocholine. If R1 is a hydrogen and R2 is acyl then the molecule is a 2-acyl-sn-glycero-3-phosphocholine.


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


N(5)-acyl-L-ornithine ester(1+)

A primary ammonium ion obtained by protonation of the amino group of any N(5)-acyl-L-ornithine ester; major species at pH 7.3.


lysophosphatidylcholine 16:2

A lysophosphatidylcholine in which the remaining acyl group contains 16 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 ammonium ion derivative that is the conjugate acid of (R)-methcathinone obtained from the protonation of the amino group. It is the major species at pH 7.3.


phosphatidylcholine O-40:2

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 2 double bonds.


L-glutaminium

An optically active form of glutaminium having L-configuration.


An organic cation obtained by protonation of the amino groups of any alkane-alpha,omega-diamine; major species at pH 7.3.


lysophosphatidylcholine P-18:3

A 1-O-(alk-1-enyl)-sn-glycero-3-phosphocholine in which the alk-1-enyl group contains 18 carbons and 3 additional double bonds.


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


A primary ammonium ion resulting from the protonation of the amino group of 3-amino-3-deoxy-D-glucopyranose.


phosphatidylcholine O-44:0

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 44 carbons and 0 double bonds.


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


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


phosphatidylcholine 26:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 26 carbons in total with 0 double bonds.


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


chloroorienticin B(1+)

An organic cation obtained by deprotonation of the carboxy groups and protonation of the two free amino groups of chloroorienticin B.


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


Conjugate acid of 1-benzyl-2-methyl-1,2,3,4-tetrahydroisoquinoline arising from protonation of the tertiary amino group.


N-(ammoniomethyl)urea

Conjugate acid of N-(aminomethyl)urea.


sphingomyelin 28:0

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 28 with 0 double bonds.


A phosphatidylcholine O-38:0 in which the alkyl and acyl groups specified at positions 1 and 2 are hexadecyl and docosanoyl respectively.


An organic cation that is the conjugate acid of 6-hydroxypseudooxynicotine, obtained by protonation of the secondary amino group; major species at pH 7.3.


sphingomyelin 44:2

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 44 with 2 double bonds.


cationic sphingoid

An organic cation obtained by protonation of the amino function of any sphingoid


sphingomyelin 30:4

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 30 with 4 double bonds.


A phosphatidylcholine 36:4 in which one acyl group has 16 carbons and is fully saturated while the other has 20 carbons and 4 double bonds (position not specified).


NK13650 D

Major microspecies at pH 7.3.


L-valinium

The L-enantiomer of  valinium.


A phosphatidylcholine 26:0 in which the acyl groups at positions 1 and 2 are specified as octadecanoyl and octanoyl respectively.


sphingomyelin 40:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 40 with 1 double bond.


A doubly-charged organic cation arising from protonation of the two tertiary amino functions of methiothepin.


phosphatidylcholine 44:10

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 10 double bonds.


(S)-coclaurinium

Conjugate acid of (S)-coclaurine arising from protonation of the isoquinoline nitrogen.


phosphatidylcholine 36:8

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 36 carbons and 8 double bonds.


A lysophosphatidylcholine 18:0 in which the acyl group is specified as stearoyl (octadecanoyl) and is located at position 2.


A phosphatidylcholine 34:1 in which the 1- and 2-acyl groups are specified as hexadecanoyl (palmitoyl) and 11Z-octadecenoyl (cis-vaccenoyl) respectively.


A sphingomyelin 41:1 in which the N-acyl group and sphingoid base are specified as tricosanoyl and sphingosine respectively.


A phosphatidylcholine 40:5 in which the acyl groups at C-1 and C-2 are octadecanoyl and (4Z,7Z,10Z,13Z,16Z)-docosapentaenoyl 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 acetyl respectively.


cationic chitosan

Polycationic form of chitosan arising from global protonation of the 2-amino groups; 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 (3S)-3-hydroxy-L-lysine: major species at pH 7.3.


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


phosphatidylcholine 40:8

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 8 double bonds.


A phosphatidylcholine (22:4/20:4) which carries a (6Z,9Z,12Z,15Z)-22-oxodocosa-6,9,12,15-tetraen-22-yl group at position 1 and a (5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoyl group at position 2.


A primary aliphatic ammonium ion that is the conjugate acid of ethanolamine arising from protonation of the primary amino function.


sphingomyelin 44:5

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 44 with 5 double bonds.


D-leucinium

The D-enantiomer of leucinium.


An alkylacylglycero-3-phosphocholine in which the alkyl and acyl groups are located at positions 1 and 2 respectively. Major species at pH 7.3.


p-aminophenylphosphocholine

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


A cationic sphingoid obtained by protonation of the amino group of sphinga-4E,8E-dienine.


A piperidinium ion resulting from the protonation of the nitrogen atom of flavoxate.


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


aculene B(1+)

A secondary ammonium ion that is the conjugate acid of aculene B, arising from the protonation of the pyrrolidine nitrogen. Major species at pH 7.3.


phosphatidylcholine 38:3

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


A lysophosphatidylcholine 18:2 in which the acyl group is specified as linoleoyl and is located at position 2.


An ammonium ion derivative resulting from the protonation of the tertiary amino group of 19-O-acetylhoerhammericine. The major species at pH 7.3. Note the stereoconfiguration of the epoxy group is based on CHEBI:144374, and of the 19-acetoxy group on CHEBI:144372.


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


A phosphatidylcholine 24:0 in which the acyl groups specified at positions 1 and 2 are nonanoyl and pentadecanoyl respectively.


phosphatidylcholine O-28:0

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 28 carbons and no double bonds.


A  1-O-acyl-sn-glycero-3-phosphocholine in which the 1-acyl group is (9Z)-hexadecenoyl (palmitoleoyl).


An organic cation obtained by protonation of the free amino group of any N-monoacetylalkane-alpha,omega-diamine; major species at pH 7.3.


A quaternary ammonium ion resulting from the methylation of the amino group of (S)-canadine in which the hydrogen at position 1 and the pro-S hydrogen at position 13 have been replaced by hydroxy groups.


An ammonium ion derivative resulting from the protonation of the tertiary amino group of hoerhammericine. The major species at pH 7.3. Note that the stereoconfiguration of the epoxy group is based on CHEBI:144374, and of the 19 hydroxy group on CHEBI:144372 (the same enzyme produces the two).


An organic cation that is the conjugate acid of 2,6-dihydroxypseudooxynicotine, obtained by protonation of the secondary amino group; major species at pH 7.3.


A lysophosphatidylcholine 18:0 in which the acyl substituent is located at position 1 and is specified as stearoyl.


sphingosylphosphocholine acid

A cationic phosphosphingolipid consisting of sphingosine having a phosphocholine moiety attached to its primary hydroxyl group.


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


A phosphatidylcholine 37:4 in which the acyl substituents at positions 1 and 2 are specified as heptadecanoyl and arachidonoyl respectively.


phosphatidylcholine O-38:4

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 38 carbons and 4 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 specified as hexadecyl and succinyl respectively.


An ammonium ion that is the conjugate base of 5-hydroxykynurenamine, arising from selective protonation of the primary alkylamino function; major species at pH 7.3.


phosphatidylcholine (20:4/22:1)

A phosphatidylcholine 42:5 in which the fatty acyl groups at positions 1 and 2 are specified as C20:4 and C22:1 respectively.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at positions 1 and 2 are specified as heptadecanoyl and (9Z,12Z,15Z)-octadecatrienoyl respectively.


A sphingomyelin d18:1 in which the ceramide N-acyl group contains 24 carbons, 1 hydroxy group and 1 double bond.


phosphatidylcholine 10:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 10 carbons and no double bonds.


aralkylammonium

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


deaminohydroxyblasticidin S(1+)

Conjugate acid of deaminohydroxyblasticidin S having an anionic carboxy group and protonated primary amino and guanidino groups; major species at pH 7.3.


DIMYRISTOYLPHOSPHATIDYLCHOLINE

A 1,2-diacyl-sn-glycero-3-phosphocholine where the two phosphatidyl acyl groups are specified as tetradecanoyl (myristoyl).


A N-acylsphinganine-1-phosphocholine in which the acyl group specified is (15Z)-tetracosenoyl.


sphingomyelin 35:1

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 35 with 1 double bond.


phosphatidylcholine P-32:1

A 1-O-(alk-1-enyl)-2-O-acyl-sn-glycero-3-phosphocholine in which the alk-1-enyl and acyl groups contain a total of 32 carbon atoms with 1 additional double bond.


decyltrimethylammonium ion

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


A phosphatidylcholine 38:0 in which the acyl groups at positions 1 and 2 are specified as eicosanoyl and octadecanoyl respectively.


An ammonium ion resulting from the protonation of the non-acylated nitrogen of N(1),N(8)-bis(sinapoyl)-spermidine. The major species at pH 7.3.


An organic cation obtained by protonation of the anilino function of tricaine.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which the phosphatidyl acyl groups at positions 1 and 2 are both arachidonoyl.


sphingomyelin 36:3

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 36 with 3 double bonds.


An unsymmetrical C3 cyanine dye having 1,3-benzoxazol-2-yl and pyridinium-4-yl substituents at each end.


An alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino and guanidino groups of (2S,3R)-capreomycidine.


streptothricin F(3+)

A primary aliphatic ammonium ion which is obtained from streptothricin F by protonation of the guanidino and amino groups.


phosphatidylcholine (16:0/16:1)

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


An alpha-amino-acid cation that is the conjugate acid of L-canavanine; major species at pH 7.3.


The ammonium ion formed from 4-amino-5-aminomethyl-2-methylpyrimidine by protonation of the primary amino group; principle microspecies at pH 7.3.


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


trimethylenediaminium

An alkane-alpha,omega-diammonium(2+) that is the dication of trimethylenediamine arising from protonation of both nitrogens.


The cation obtained by protonation of the amino group of 2-phenylethylamine.


sphingomyelin d18:1/26:1

A sphingomyelin d18:1 in which the fatty acyl group contains 26 carbons and 1 double bond.


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


donepezil (1+)

A piperidinium ion resulting from the protonation of amino group of donepezil.


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


phosphatidylcholine 35:0

A phosphatidylcholine in which the two acyl groups contain a total of 35 carbons and no double bonds.


An ammonium ion resulting from the protonation of the nitrogen of the dimethylaminoethyl substituent of ent-diltiazem. The major species at pH 7.3.


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


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


streptothricin D(5+)

A primary aliphatic ammonium ion which is obtained from streptothricin D by protonation of the guanidino and amino groups.


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

A phosphatidylcholine P-36:1 in which the 1-alk-1-enyl group contains 18 carbons and no additional double bonds while the 2-acyl group contains 18 carbons and 1 double bond.


phosphatidylcholine 12:0

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the two acyl groups contain a total of 12 carbons and no double bonds.


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


phosphatidylcholine 44:1

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.


An alkane-alpha,omega-diammonium(2+) that is the dication of putrescine (1,4-butanediamine) arising from protonation of both primary amino groups; major species at pH 7.3.


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


phosphatidylcholine O-42:1

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 42 carbons and 1 double bond.


erythromycin A(1+)

An erythromycin cation that is the conjugate acid of erythromycin A, 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.


sphingomyelin 38:3

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 38 with 3 double bonds.


(R)-EDELFOSINE

A 1-octadecyl-2-methylglycero-3-phosphocholine that is the (R)-enantiomer of edelfosine.


trimethylammonium

An ammonium ion that is the conjugate acid of trimethylamine, obtained via protonation of the nitrogen; major species at pH 7.3.


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


L-alaninium

The L-enantiomer of alaninium.


A sphingomyelin 42:1 obtained by formal condensation of the carboxy group of pentacosanoic acid with the amino group of 14-methylhexadecasphingosine-1-phosphocholine. It is a metabolite of the nematode Caenorhabditis elegans.


azelaoyl-PAF

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 8-carboxyoctanoyl respectively.


A phosphatidylcholine 28:0 in which the two acyl substituents at positions 1 and 2 are specified as palmitoyl and lauroyl respectively.


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


phosphatidylcholine (22:4/20:4)

A phosphatidylcholine 42:8 in which the fatty acyl groups at positions 1 and 2 are specified as C22:4 and C20:4 respectively. The positions of the double bonds are unspecified.


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


phosphatidylcholine 40:4

A 1,2-diacyl-sn-glycero-3-phosphocholine in which the acyl groups at C-1 and C-2 contain 40 carbons in total and 4 double bonds.


An organic cation obtained by protonation of the two tertiary amino groups of JTE-607 free base.


phosphatidylcholine (17:1/18:2)

A phosphatidylcholine 35:3 in which the fatty acyl groups at positions 1 and 2 are specified as C17:1 and C18:2 respectively.


cholines

A quaternary ammonium ion based on the choline ion and its substituted derivatives thereof.


An ammonium ion resulting from the protonation of the tertiary amino group of  1-[3-(dimethylamino)propyl]-1-(4-fluorophenyl)-1,3-dihydro-2-benzofuran-5-carbonitrile.


phosphatidylcholine O-35:2

An alkyl,acyl-sn-glycero-3-phosphocholine in which the alkyl or acyl groups at positions 1 and 2 contain a total of 35 carbons and 2 double bonds.


Major species at pH 7.3


An organic cation obtained by protonation of cariprazine.


A phosphatidylcholine O-36:5 in which the alkyl and acyl groups specified at positions 1 and 2 are hexadecyl and (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoyl respectively.


sphingomyelin 32:0

A sphingomyelin in which the total number of carbons in the sphingoid base and fatty acyl groups is 32 with 0 double bonds.


lysophosphatidylcholine O-18:2

A monoalkylglycerophosphocholine in which the alkyl group contains 18 carbons and 2 double bonds. 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.


An N-hydroxydocosenoylsphingosine-1-phosphocholine in which the N-acyl group is specified as (13Z)-3-hydroxydocos-13-enoyl.


The conjugate acid of O-demethylpuromycin; major species at pH 7.3.


Any 1-acyl-sn-glycero-3-phosphocholine that has an oxidized fatty acyl component. Major species at pH 7.3.


A secondary ammonium ion that is the conjugate acid of dizocilpine obtained by protonation of the secondary amino group. Major microspecies at pH 7.3.


A phosphatidylcholine O-36:0 in which the alkyl and acyl groups specified at positions 1 and 2 are hexadecyl and eicosanoyl respectively.


phosphatidylcholine 39:4

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 4 double bonds.


A 1,2-diacyl-sn-glycero-3-phosphocholine in which 1 and 2-acyl groups are specified as palmitoyl (hexadecanoyl) and (10E)-9-hydroperoxyoctadecenoyl respectively.


alkylaminium

A primary ammonium ion obtained by protonation of the amino goup of any alkylamine; major species at pH 7.3.


The tetracation of ToTo-1 dye.


An organic cation obtained by protonation of the two tertiary amino functions of 1-[2-(benzhydryloxy)ethyl]-4-(3-phenylpropyl)piperazine.


A phosphatidylcholine 34:0 in which the 1- and 2-acyl groups are specified as hexadecanoyl (palmitoyl) and octadecanoyl (stearoyl) respectively.


A phosphatidylcholine O-42:2 in which the alkyl and acyl groups specified at positions 1 and 2 are icosyl and (13Z,16Z)-docosadienoyl respectively.


A phosphatidylcholine O-32:1 in which the alkyl and acyl groups specified at positions 1 and 2 are tetradecyl and (9Z)-octadecenoyl respectively.


phosphatidylcholine O-34:1

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 34 carbons and 1 double bond.


Major microspecies at pH 7.3.


A sphingomyelin d18:1 in which the N-acyl group is specified as docosanoyl


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


phosphatidylcholine (18:1/22:2)

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


phosphatidylcholine O-36:1

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 36 carbons and 1 double bond.


An ammonium ion derivative that is the conjugate acid of cinanserin, obtained by the protonation of the tertiary amino group. It is the major microspecies at pH 7.3.


phosphatidylcholine P-40:5

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 40 carbon atoms in total with 5 additional double bonds.


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


phosphatidylcholine O-40:3

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 3 double bonds.


An organic cation that is the conjugate base of lorcaserin, obtained by protonation of the endoc yclic amino group.