A glycosyloxyflavone that consists of kaempferol attached to a 2-E-p-coumaroyl-alpha-L-rhamnopyranosyl moiety at position 7 via a glycosidic linkage. Isolated from the flowers and fruits of Tetrapanax papyriferus, it exhibits antineoplastic activity.


kalimantacin A

A  fatty acid derivative isolated from the fermentation broth of Alcaligenes sp. YL-02632S. It is an antibiotic with antibacterial activity.


kalimantacin B

A fatty acid derivative isolated from the fermentation broth of Alcaligenes sp. YL-02632S. It is an antibiotic with antibacterial activity.


KANSUIPHORIN A

A tetracyclic diterpenoid that is 13-hydroxyingenol in which the hydroxy groups at positions 3, 13 and 20 are esterified by 2,3-dimethylbutyric acid, lauric acid and palmitic acid. Isolated from the roots of Euphorbia kansui, it exhibits anti-cancerous activity.


KANSUIPHORIN B

A tetracyclic diterpenoid that is 6,7-epoxy-13-hydroxyingenol in which the hydroxy groups at positions 3, 13 and 20 are esterified by 2,3-dimethylbutyric acid, lauric acid and palmitic acid. Isolated from the roots of Euphorbia kansui, it exhibits anti-cancerous activity.


karalicin

A  pentitol derivative that is 3-O-acetyl-1-deoxypentitol substituted by a 4-methoxyphenyl group at position 1. Isolated from the fermentation broth of Pseudomonas fluorescens and Pseudomonas putida, it exhibits anti-HSV-1 activity.


KEMPOPEPTIN A

A 19-membered cyclodepsipeptide isolated from Floridian marine cyanobacterium Lyngbya sp. It exhibits inhibitory activity towards the enzymes elastase and chymotrypsin.


kempopeptin B

A 19-membered cyclodepsipeptide isolated from Floridian marine cyanobacterium Lyngbya sp. It exhibits inhibitory activity towards the enzyme trypsin.


A steroid glycoside isolated from the roots of Cynanchum auriculatum and has been shown to exhibit cytotoxicity against human tumour cell lines.


kitastatin 1

An 18-membered cyclodepsipeptide having a 3-amino-2-hydroxybenzoyl group attached to the amino terminus. It is isolated from an Alaskan Kitasatospora sp. and exhibits antineoplastic activity.


KLUGINE

An isoquinoline alkaloid that is emetan substituted by methoxy groups at positions 7' and 11 and hydroxy groups at positions 1', 6' and 10'. Isolated from Psychotria klugii, it exhibits antileishmanial and antiplasmodial activities.


KOMAROVIQUINONE

A tetracyclic diterpenoid isolated from Dracocephalum komarovii and has been shown to exhibit trypanocidal activity.


koshikamide A2

A polypeptide isolated from a marine sponge Theonella sp. and has been found to inhibit the growth of P388 murine leukemia cells.


A trihydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 7, 2' and 4', a lavandulyl group at position 8 and a methoxy group at position 5. Isolated from the roots of Sophora flavescens, it exhibits cytotoxicity against human myeloid leukemia HL-60 cells.


A dimethoxyflavanone that is (2S)-(-)-kurarinone in which the hydroxy group at position 2' is replaced by a methoxy group. Isolated from the roots of Sophora flavescens, it exhibits cytotoxicity against human myeloid leukemia HL-60 cells.


kweichowenol B

A benzoate ester that is the diester obtained by the formal condensation of two molecules of benzoic acid with the hydroxymethyl group at position 1 and the hydroxy group at position 4 of 1-(hydroxymethyl)cyclohex-5-ene-1,2,3,4-tetrol the (1S,4R,5S,6S stereoisomer). Isolated from the leaves of Uvaria kweichowensis, it exhibits antitumour activity.


salaspermic acid

A hexacyclic triterpenoid that is D:A-friedooleanan-29-oic acid substituted by a hydroxy group at position 3 and an epoxy group across positions 3 and 24 (the (3beta,20alpha stereoisomer). Isolated from  Salacia macrosperma and Tripterygium wilfordii, it exhibits anti-HIV activity.


salvileucalin B

A diterpenoid with a rearranged neo-clerodane skeleton isolated from Salvia leucantha and has been shown exhibit antineoplastic activity.


salvin A

A pentacyclic triterpenoid that is urs-12-en-28-oic acid substituted by hydroxy groups at positions 2, 3 and 5 (the 2alpha,3beta stereoisomer). Isolated from Salvia santolinifolia, it exhibits inhibitory activity against cholinesterase.


salvin B

A pentacyclic triterpenoid that is urs-12-en-28-oic acid substituted by hydroxy groups at positions 3, 6 and 24 (the 3alpha,6alpha stereoisomer). Isolated from Salvia santolinifolia, it exhibits inhibitory activity against cholinesterase.


SALZMANNIANOSIDE A

A triterpenoid saponin that consists of gypsogenin attached to a alpha-L-rhamnopyranosyl-(1->2)-[beta-D-glucopyranosyl-(1->4)]-alpha-L-arabinopyranosyl] residue at position 3 via a glycosidic linkage. Isolated from Serjania salzmanniana, it exhibits antifungal and molluscicidal activities.


SALZMANNIANOSIDE B

A triterpenoid saponin that is the tetrasaccharide derivative of hederagenin. Isolated from Serjania salzmanniana, it exhibits antifungal and molluscicidal activities.


SAMADERINS B

A quassinoid isolated from Quassia indica and Samadera madagascariensis. It exhibits antimalarial and cytotoxic activities.


SAMADERINS C

A quassinoid  isolated from Quassia indica and has been shown to exhibit antineoplastic activity.


samaderine E

A quassinoid  isolated from  Quassia indica and Samadera indica and has been shown to exhibit antimalarial and cytotoxic activities.


samaderine X

A quassinoid isolated from Quassia indica and has been shown to exhibit antimalarial and cytotoxic activity.


samaderine Y

A quassinoid isolated from  Ailanthus malabarica and Quassia indica and has been shown to exhibit cytotoxic activity.


YADANZIOLIDE C

A quassinoid isolated from Quassia indica and has been shown to exhibit antimalarial and antineoplastic activity.


SANDWICENSIN

A member of the class of pterocarpans that is (6aR,11aR)-pterocarpan substituted by a hydroxy group at position 3, a methoxy group at position 9 and a prenyl group at position 10. Isolated from  Erythrina glauca and Erythrina stricta, it exhibits anti-HIV-1 activity.


beta-sanshool

An enamide obtained by the fromal condensation of 2-methylpropanamine with  dodeca-2,6,8,10-tetraenoic acid (the 2E,6E,8E,10E stereoisomer). Isolated from Zanthoxylum piperitum, it exhibits inhibitory activity against acyl-CoA:cholesterol acyltransferase.


gamma-sanshool

An enamide obtained by the formal condensation of 2-methylpropanamine with tetradeca-2,4,8,10,12-pentaenoic acid (the 2E,4E,8Z,10E,12E stereoisomer). Isolated from Zanthoxylum piperitum, it exhibits inhibitory activity against acyl-CoA:cholesterol acyltransferase.


A germacrane sesquiterpenoid that is 4,5-epoxygermacra-9Z-ene substituted by hydroxy groups at positions 1, 2 and 6. Isolated from Santolina insularis, it exhibits cytotoxicity against human colon carcinoma cell line.


sapinmusaponin Q

A triterpenoid saponin isolated from  Sapindus mukorossi and has been shown to exhibit inhibitory activity against platelet aggregation.


sapinmusaponin R

A triterpenoid saponin isolated from Sapindus mukorossi and has been shown to exhibit inhibitory activity against platelet aggregation.


saponaceol A

A  tetracyclic triterpenoid isolated from Tricholoma saponaceum.


SAPPANCHALCONE

A member of the class of chalcones that consists of trans-chalcone substituted by hydroxy groups at positions 3, 4 and 4' and a methoxy group at position 2'. Isolated from Caesalpinia sappan, it exhibits neuroprotective and cytoprotective activity.


SARASINOSIDE J

A triterpenoid saponin isolated from the sponge Melophlus sarasinorum and has been shown to exhibit antimicrobial activity.


A 3beta-hydroxy steroid consisting of 23,24-dimethylcholest-16-ene substituted by hydroxy groups at positions 3, 5, 6 and 20 (the 3beta,5alpha,6beta,20S stereoisomer). Isolated from the soft coral Sarcophyton trocheliophorum, it exhibits cytotoxic activity against human cancer cells.


SCALUSAMIDE A

A pyrrolidine alkaloid that is a monocarboxylic acid amide obtained by the formal condensation of (8E)-2-methyl-3-oxodec-8-enoic acid with (2R)-pyrrolidin-2-ylmethanol. Isolated from the the cultured broth of the fungus Penicillium citrinum, it exhibits anti-fungal and antibacterial activity.


sch 213766

A pyrrolidinone derivative that is the methyl ester of sch 210972. Isolated from fungal fermentation broth of Chaetomium globosum, it exhibits inhibitory activity against chemokine receptor CCR-5.


sch 725432

A sesquiterpenoid based on the caryophyllene ring system. Isolated from the fungal fermentation broth of Chrysosporium pilosum, it exhibits antifungal activity.


sch 54445

An organic heteroheptacyclic compound isolated from the fermentation culture broth of Actinoplanes sp. It is a broad-spectrum antifungal agent.


sch 642305

A macrocyclic lactone isolated from the fermentation broth of the fungal culture Penicillium verrucosum and has been shown to exhibit inhibitory activity against bacterial DNA primase enzyme.


taiwanhomoflavone A

A  biflavonoid that is a dimer resulting from the coupling of 7,4'-dimethoxy-5-hydroxy-6-methylflavone and 5,7,4'-trihydroxyflavone resulting in a bond between C-3' of the methoxyphenyl ring and C-8 of the chromene ring respectively. Isolated from Cephalotaxus wilsoniana, it exhibits cytotoxic activity.


taiwanhomoflavone-B

A biflavonoid isolated from  Cephalotaxus wilsoniana and has been shown to exhibit antineoplastic activity.


taiwankadsurin B

An organic heteropentacyclic compound found in Kadsura philippinensis. A homolignan that has been found to exhibit mild cytotoxicity against human KB and Hela tumor cells.


taiwanschirin D

An  organic heterotetracyclic compound isolated from the stems of Kadsura matsudai.


talosin A

A  glycosyloxyisoflavone that is  genistein attached to a alpha-L-6-deoxy-talopyranosyl residue at position 7 via a glycosidic linkage. Isolated from Kitasatospora kifunensis, it exhibits antifungal activity.


talosin B

A  glycosyloxyisoflavone that is  genistein attached to alpha-L-6-deoxy-talopyranosyl residues at positions 7 and 4' respectively. Isolated from Kitasatospora kifunensis, it exhibits antifungal activity.


tanariflavanone A

A  hydroxyflavanone with a  pyranochromane skeleton that is 3,4,7,8-tetrahydro-2H,6H-pyrano[3,2-g]chromen-6-one substituted by geminal methyl groups at position 2, hydroxy groups at positions 3 and 5 and a phenyl group at position 8 which in turn is substituted by a geranyl group at position 2 and hydroxy groups at positions 3 and 4. Isolated from Macaranga tanarius, it exhibits alleopathic effect.


TANARIFLAVANONE B

A trihydroxyflavanone that consists of (2S)-2,3-dihydro-2'H,4H-2,5'-bichromen-4-one skeleton substituted by hydroxy groups at positions 5, 7 and 8', a methyl group at position 2', a prenyl group at position 6 and a 4-methylpent-3-enyl group at position 2'. Isolated from Macaranga tanarius, it exhibits alleopathic effect.


TANARIFLAVANONE C

A tetrahydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5,7, 3' and 4', a geranyl group at position 2' and a 2-hydroxy-3-methylbut-3-en-1yl group at position 6. Isolated from Macaranga tanarius, it exhibits radical scavenging activity.


TANARIFLAVANONE D

A tetrahydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7, 3' and 4' and a 6-hydroxy-3,7-dimethylocta-2,7-dienyl group at position 6. Isolated from Macaranga tanarius, it exhibits antineoplastic and radical scavenging activities.


tanghinin

A  cardenolide glycoside that is  tanghinigenin attached to a 2-O-acetyl-6-deoxy-3-O-methyl-alpha-L-glucopyranosyl residue at position 3 via a glycosidc linkage. Isolated from Cerbera manghas, it exhibits cytotoxic activities against oral human epidermoid carcinoma (KB), human breast cancer cell (BC) and human small cells lung cancer.


deacetyltanghinin

A  cardenolide glycoside that is the deacetyl derivative of tanghinin. Isolated from Cerbera manghas, it exhibits cytotoxic activities against oral human epidermoid carcinoma (KB), human breast cancer cell (BC) and human small cells lung cancer.


TASUMATROLS E

A  taxane diterpenoid isolated from Taxus sumatrana and has been shown to exhibit antineoplastic activity.


TASUMATROL F

A taxane diterpenoid isolated from Taxus sumatrana and has been shown to exhibit antineoplastic activity.


(+)-tephrorin A

A  monomethoxyflavanone that is (2S)-7-methoxyflavanone substituted at position 8 by a tetrahydrofuran ring which in turn is substituted by geminal methyl groups at position 2, an acetoxy group at position 3 and a hydroxy group at position 5. Isolated from Tephrosia purpurea, it exhibits antineoplastic activity.


(+)-tephrorin B

A  monohydroxyflavanone that is (2S)-7-hydroxyflavanone substituted at position 8 by a tetrahydrofuran ring  which in turn is substituted by geminal methyl groups at position 2 and a cinnamoyloxy group at position 3. Isolated from Tephrosia purpurea, it exhibits antineoplastic activity.


(+)-tephrosone

A member of the class of  chalcones isolated from Tephrosia purpurea and has been shown to exhibit antineoplastic activity.


termilignan B

An  olefinic compound that is 2,3-dimethylbuta-1,3-diene substituted by a 4-hydroxyphenyl and a 1,3-benzodioxol-5-yl group. It has been isolated from Terminalia sericea.


TERNSTROSIDE A

A  beta-D-glucoside with 2-(3,4-dihydroxyphenyl)ethoxy residue at the anomeric position and a [(3,4-dihydroxyphenyl)acetyl]oxy residue at position 2. Isolated from Ternstroemia japonica, it exhibits antioxidant activity.


TERNSTROSIDE B

A beta-D-glucoside with 2-(3,4-dihydroxyphenyl)ethoxy residue at the anomeric position and a [(4-hydroxyphenyl)acetyl]oxy residue at position 2. Isolated from Ternstroemia japonica, it exhibits antioxidant activity.


TERNSTROSIDE C

A beta-D-glucoside with 2-(3,4-dihydroxyphenyl)ethoxy residue at the anomeric position and a [(3,4-dihydroxyphenyl)acetyl]oxy residue at position 3. Isolated from Ternstroemia japonica, it exhibits antioxidant activity.


TERNSTROSIDE D

A beta-D-glucoside with 2-(3,4-dihydroxyphenyl)ethoxy residue at the anomeric position and a [(3,4-dihydroxyphenyl)acetyl]oxy residue at position 6. Isolated from Ternstroemia japonica, it exhibits antioxidant activity.


TERNSTROSIDE E

A beta-D-glucoside with 2-(4-hydroxyphenyl)ethoxy residue at the anomeric position and a [(3,4-dihydroxyphenyl)acetyl]oxy residue at position 6. Isolated from Ternstroemia japonica, it exhibits antioxidant activity.


ternstroside F

A beta-D-glucoside with 2-(2,4,5-trihydroxyphenyl)ethoxy residue at the anomeric position and a [(3,4-dihydroxyphenyl)acetyl]oxy residue at position 6. Isolated from Ternstroemia japonica, it exhibits antioxidant activity.


terpendole J

An organic heteroheptacyclic compound isolated from Albophoma yamanashiensis and has been shown to exhibit inhibitory activity against acyl-CoA:cholesterol acyltransferase.


terpendole L

A natural product found in Albophoma yamanashiensis.


A member of the class of 7-hydroxyisoflavones that is 7-hydroxyisoflavone with additional hydroxy groups at positions 5, 3' and 4' and a prenyl group at position 2'. Isolated from the roots of Psorothamnus arborescens, it exhibits antileishmanial activity.


A member of the class of xanthones that is 9H-xanthen-9-one substituted by hydroxy groups at positions 3, 4, 6 and 8 and prenyl groups at positions 1, 2 and 5. Isolated from Garcinia xanthochymus, it exhibits enhancement of nerve growth factor-mediated neurite outgrowth in PC12D cells.


A flavanone glycoside that is (2S)-5,7,3',5'-tetrahydroxyflavanone attached to a beta-D-glucopyranosyl residue at position 7 via a glycosidic linkage. Isolated from Jasminum lanceolarium, it exhibits radical scavenging activity.


A glycosyloxyflavone that is 3,5,6,7,4'-pentahydroxyflavonol substituted by a rutinosyl group at position 3 via a glycosidic linkage. Isolated from  Daphniphyllum calycinum, it exhibits antioxidant activity.


TETRAHYDROXYSQUALENE

A  triterpenoid that is  squalene substituted by four hydroxy groups. It is isolated from Rhus taitensis and has been shown to exhibit antimycobacterial activity.


A  diterpenoid that is 13,14,15,16-tetranorlabdane substituted  by hydroxy grousp at positions 8, 12 and 18. It has been isolated from the aerial parts of Crassocephalum mannii and has been shown to exhibit COX-1 and COX-2 activity.


THEOGRANDIN II

A  glycosyloxyflavone and a  monosaccharide sulfate that is the 8-O-beta-D-glucuronopyranoside-3''-O-sulfate derivative of  hypolaetin. It has been isolated from the seeds of Theobroma grandiflorum and has been shown to exhibit antioxidant activity.


THIAZOMYCIN

A  heterodetic cyclic peptide isolated from Amycolatopsis fastidiosa.


thiomarinol A

An organosulfur heterocyclic compound produced by a marine bacterium Alteromonas rava and has been shown to exhibit antibacterial activity against Gram-positive and Gram-negative bacteria.


thiomarinol B

A sulfone produced by a marine bacterium Alteromonas rava and has been shown to exhibit antibacterial activity against Gram-positive and Gram-negative bacteria.


TIANSHIC ACID

An  olefinic fatty acid that is (9E)-octadec-9-enoic acid substituted by hydroxy groups at positions 8, 11 and 12. It has been isolated from Allium fistulosum and Ophiopogon japonicus.


An organonitrogen heterocyclic compound that is a 21-membered macrocyclic lactam, substituted by a ({1-[(cyclohex-1-en-1-ylcarbonyl)amino]cyclopropyl}carbonyl)oxy group at position 17, which is obtained from Streptomyces sp. TC-1190. It exhibits growth inhibitory effects on a series of human tumour cell lines.


An organonitrogen heterocyclic compound that is a 21-membered macrocyclic lactam substituted by a ({1-[(cyclohex-1-en-1-ylcarbonyl)amino]cyclopropyl}carbonyl)oxy group at position 18. It is isolated from Streptomyces sp. TC-1190 and exhibits growth inhibitory effects on a series of human tumour cell lines.


A polyene antibiotic that is 2-amino-4,5-dihydroxycyclohex-2-en-1-one in which the hydrogen at position 4 is replaced by a by an all-E-6-carboxyhexa-1,3,5-trien-1-yl group; in which the amino group has been acylated by a (2E)-2,4-dimethyloct-2-enoyl group; and in which the carboxy group of the resulting carboxylic acid has been condensed with the amino group of 2-amino-3-hydroxycyclopent-2-en-1-one to give the corresponding carboxamide. TMC-1A is an antitumour antibiotic isolated from Streptomyces sp. A-230.


A polyene antibiotic that is TMC-1A in which the 2,4-dimethyloct-2-enoyl group has been replaced by a (2E)-2,6-dimethyloct-2-enoyl group. TMC-1B is an antitumour antibiotic isolated from Streptomyces sp. A-230.


A polyene antibiotic that is TMC-1A in which the 2,4-dimethyloct-2-enoyl group has been replaced by an (E,E)-4,6-dimethyldeca-2,4-dienoyl group. TMC-1C is an antitumour antibiotic isolated from Streptomyces sp. A-230.


A polyene antibiotic that is TMC-1A in which the 2,4-dimethyloct-2-enoyl group has been replaced by an (E)-4,6-dimethyldec-2-enoyl group. TMC-1D is an antitumour antibiotic isolated from Streptomyces sp. A-230.


An epoxide which is a carboxamide obtained by the formal condensation of one of the carboxy groups of oxirane-2,3-dicarboxylic acid with N-{3-[(4-aminobutyl)amino]propyl}-L-tyrosinamide. It is a natural product, isolated from Gliocladium sp. F-2665. TMC-52A acts as an inhibitor of cysteine proteinases, particularly cathepsin B (EC 3.4.22.1), cathepsin L (EC 3.4.22.15), and papain (EC 3.4.22.2); IC50 values are 320 nM, 13 nM, and 44 nM, respectively. The epoxide group has trans configuration but its exact stereochemistry is uncertain: it is either (2R,3R) or (2S,3S).


An epoxide which is a carboxamide obtained by the formal condensation of one of the carboxy groups of oxirane-2,3-dicarboxylic acid with N-{4-[(3-aminopropyl)amino]butyl}-L-tyrosinamide. It is a natural product, isolated from Gliocladium sp. F-2665. TMC-52B acts as an inhibitor of cysteine proteinases, particularly cathepsin B (EC 3.4.22.1), cathepsin L (EC 3.4.22.15), and papain (EC 3.4.22.2); IC50 values are 200 nM, 10 nM, and 7 nM, respectively. The epoxide group has trans configuration but its exact stereochemistry is uncertain: it is either (2R,3R) or (2S,3S).


An epoxide which is a carboxamide obtained by the formal condensation of one of the carboxy groups of oxirane-2,3-dicarboxylic acid with N-{3-[(4-aminobutyl)amino]propyl}-L-phenylalaninamide. It is a natural product, isolated from Gliocladium sp. F-2665. TMC-52C acts as an inhibitor of cysteine proteinases, particularly cathepsin B (EC 3.4.22.1), cathepsin L (EC 3.4.22.15), and papain (EC 3.4.22.2), with IC50 values of 460 nM, 10 nM, and 88 nM, respectively. The epoxide group has trans configuration but its exact stereochemistry is uncertain: it is either (2R,3R) or (2S,3S).


An epoxide which is a carboxamide obtained by the formal condensation of one of the carboxy groups of oxirane-2,3-dicarboxylic acid with N-{4-[(3-aminopropyl)amino]butyl}-L-phenylalaninamide. It is a natural product, isolated from Gliocladium sp. F-2665. TMC-52D  acts as an inhibitor of cysteine proteinases, particularly cathepsin B (EC 3.4.22.1), cathepsin L (EC 3.4.22.15), and papain (EC 3.4.22.2), with IC50 values of 280 nM, 6 nM, and 49 nM, respectively. The epoxide group has trans configuration but its exact stereochemistry is uncertain: it is either (2R,3R) or (2S,3S).


An epoxide that is oxiran-2-ylmethanol which is acylated at position 2 by N-butanoyl-L-seryl-4-methylidenenorvalinyl group. It is a proteasome inhibitor isolated from Streptomyces.


An epoxide that is oxiran-2-ylmethanol which is acylated at position 2 by N-(6-hydroxy-6-methylheptanoyl)-L-seryl-4-methylidenenorvalinyl group. It is a proteasome inhibitor isolated from Streptomyces.


An epoxide that is oxiran-2-ylmethanol which is acylated at position 2 by an N-(isovaleroyl)threonylleucinyl group. It is a proteasome inhibitor isolated from Saccharothrix.


A 17-membered macrocyclic lactam that incorporates a phenol and a substituted indole moiety. A stereoisomer of TMC-95A, it has a [(3R)-3-methyl-2-oxopentanoyl]amino group at position 18. It acts as a proteasome inhibitor and is isolated from Apiospora montagnei Sacc. TC 1093, isolated from a soil sample.


A 17-membered macrocyclic lactam that incorporates a phenol and a substituted indole moiety. It includes a S-hydroxy group at position 11 and a (3-methyl-2-oxopentanoyl)amino group at position 18 with a S-methyl group. It acts as a proteasome inhibitor and is isolated from Apiospora montagnei Sacc. TC 1093, isolated from a soil sample.


A 17-membered macrocyclic lactam that incorporates a phenol and a substituted indole moiety. It includes a R-hydroxy group at position 11 and a (3-methyl-2-oxopentanoyl)amino group at position at position 18 with a S-methyl group. It acts as a proteasome inhibitor and is obtained from Apiospora montagnei Sacc. TC 1093, isolated from a soil sample.


tolybyssidin A

A homodetic cyclic peptide isolated from the culture medium of the cyanobacterium Tolypothrix byssoidea.


TOLYPODIOL

A diterpenoid natural product obtained from the cyanobacterium Tolypothrix nodosa. It shows strong anti-inflammatory activity in the mouse ear edema assay.


topopyrone A

A naphthochromene that is 4H-naphtho[2,3-h]chromene-4,7,12-trione substituted by a chloro group at position 10, hydroxy groups at positions 5, 9 and 11 and a methyl group at position 2. It is isolated from a fungal strain Phoma sp.BAUA2861 and acts as an inhibitor of the enzyme topoisomerase I.


topopyrone B

A naphthochromene that is 4H-naphtho[2,3-g]chromene-4,6,11-trione substituted by a chloro group at position 8, hydroxy groups at positions 5, 7 and 9 and a methyl group at position 2. It is isolated from a fungal strain Phoma sp.BAUA2861 and acts as an inhibitor of the enzyme topoisomerase I.


TOPOPYRONE C

A naphthochromene that is 4H-naphtho[2,3-h]chromene-4,7,12-trione substituted by hydroxy groups at positions 5, 9 and 11 and a methyl group at position 2. It is isolated from fungal strains Phoma and Penicillium and acts as an inhibitor of the enzyme topoisomerase I.


topopyrone D

A naphthochromene that is 4H-naphtho[2,3-g]chromene-4,6,11-trione substituted by hydroxy groups at positions 5, 7 and 9 and a methyl group at position 2. It is isolated from fungal strains Phoma and Penicillium and acts as an inhibitor of the enzyme topoisomerase I.


torososide B

A monohydroxy-9,10-anthraquinone that is the tetrasaccharide derivative of physcion. Isolated from Cassia torosa, it exhibits inhibitory effect towards the release of leucotrienes.


torvoside H

A steroid saponin that is (5alpha,6alpha,22R,25S)-6,22,26-trihydroxyfurostan-3-one in which the hydroxy group at position 6 has been converted into the beta-D-glucopyranosyl-(1->3)-alpha-L-rhamnoside derivative, while that at position 26 has been converted to its beta-D-glucoside. Torvoside H is a natural product found in the fruit of Solanum torvum which shows antiviral activity against herpes simplex virus type 1.


trachyspic acid

An  oxaspiro compound that is 1,6-dioxaspiro[4.4]non-2-en-4-one substituted by a carboxymethyl group at position 2, carboxy groups at positions 2 and 3, an oxo group at position 9 and a nonyl group at position 8. Isolated from the culture broth of the fungus Talaromyces trachyspermus, it exhibits inhibitory activity against the enzyme heparanase.


TRICHODIMEROL

An organic heterotetracyclic compound found in Trichoderma longibrachiatum and Penicillium chrysogenum.


trierixin

A 21-membered macrocycle isolated from the fermentation broth of Streptomyces sp.AC654. It exhibits antineoplastic activity.


A member of the class of  7-hydroxyisoflavones that is genistein substituted by prenyl groups at positions 6 and 8. It has been isolated from Derris scandens and Glycyrrhiza uralensis.


A trihydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7 and 3', a methoxy group at position 4' and prenyl groups at positions 8 and 2'. Isolated from Dendrolobium lanceolatum, it exhibits cytotoxic activity.


A member of the class of chalcones that is 3',5'-dimethylchalcone substituted by hydroxy groups at positions 2, 2' and 4' and a methoxy group at position 6'. Isolated from Psorothamnus polydenius, it exhibits antiparasitic activity.


A  trihydroxyflavone that is 5,6,3'-trihydroxyflavone further substituted by methoxy groups at positions 7, 8 and 4'. Isolated from Crinum latifolium, it exhibits inhibitory effect on the tube-like formation of human umbilical vein endothelial cells (HUVECs).


An extended flavonoid that consists of (2S)-flavanone substituted by hydroxy groups at positions 5, 7 and 3', prenyl groups at positions 8 and 2' and a gem-dimethyl pyran ring fused across positions 4' and 5'. Isolated from Dendrolobium lanceolatum, it exhibits antimalarial activity.


A member of the class of  xanthones that is 9H-xanthen-9-one substituted bybhydroxy groups at positions 1, 2 and 5. It is isolated from Garcinia subelliptica.


trikendiol

A  gamma-lactam that is an unusual red pigment isolated from the marine sponge Trikentrion laeve. It has been shown to exhibit anti-HIV1 activity.


TRILOBACIN

A polyketide isolated from the bark of Asimina triloba. It has been shown to exhibit  cytotoxicity in the NCI human tumor cell line screen.


tripterifordin

A kaurane diterpenoid that is (5beta,8alpha,13alpha)-18,20-epoxykauran-18-one substituted by a hydroxy group at position 16. Isolated from the roots of Tripterygium wilfordii, it exhibits anti-HIV activity.


triptonine A

A  sesquiterpene alkaloid  with anti-HIV activity isolated from Tripterygium hypoglaucum.


triptonine B

A sesquiterpene alkaloid with anti-HIV activity isolated from Tripterygium hypoglaucum.


TSUGARIOSIDE C

A  triterpenoid saponin that is (23Z)-24-methyllanosta-8,23,25-trien-21-oic acid substituted by an acetyloxy group at position 3 and a beta-D-xylopyranosyl residue at position 21 via a glycosidic linkage. It has been isolated from the fruit bodied of Ganoderma tsugae and exhibits cytotoxic activity against several different cancer cell lines.


tubelactomicin A

A 16-membered macrolide which exhibits strong and specific antimicrobial activities against rapid-growing Mycobacteria including drug-resistant strains. It is isolated from the culture broth of Nocardia sp.MK703-102F1


An epoxide that is oxiran-2-ylmethanol which is acylated at position 2 by an N-[(2R)-3-amino-2-methyl-3-oxopropanoyl]-L-threonyl-L-threonylleucinyl group. It is a proteasome inhibitor isolated from Streptomyces sp. TC 1087.


An epoxide that is oxiran-2-ylmethanol which is acylated at position 2 by an N-[(2S)-3-amino-2-methyl-3-oxopropanoyl]-L-threonyl-L-threonylleucinyl group. It is a proteasome inhibitor isolated from Streptomyces sp. TC 1087.


A quercetin O-glycoside that is quercetin substituted by a alpha-6'''-caffeoylglucosyl-beta-1,2-rhamnosyl residue at position 3 via glycosidic linkage. Isolated from  Sedum sarmentosum, it exhibits inhibitory activity against angiotensin-converting enzyme.


A quercetin O-glucoside that is quercetin substituted by a alpha-L-[6'''-p-coumaroyl-beta-D-glucopyranosyl-(1->2)-rhamnopyranosyl] residue at position 3 via a glycosidic linkage. Isolated from Ginkgo biloba, it exhibits antioxidant activity.


A quercetin O-glucoside that consists of quercetin attached to a beta-D-glucopyranosyl moiety at position 7 and a alpha-L-6'''-p-coumaroyl-beta-D-glucopyranosyl-(1->2)-rhamnopyranosyl residue at position 3 via a glycosidic linkage. Isolated from the leaves of Ginkgo biloba, it exhibits antioxidant activity.


A quercetin O-glycoside that consists of quercetin attached to a (2'',3''-digalloyl)-beta-D-galactopyranosyl residue at position 3 via a glycosidic linkage. Isolated from Euphorbia lunulata, it exhibits insulin-like activity.


A  quercetin O-glycoside that consists of quercetin substituted by a beta-D-glucopyranosyl-(1->2)-rhamnopyranosyl moiety at position 3 via a glycosidic linkage. Isolated from the leaves of Ginkgo biloba, it exhibits antioxidant activity.


A quercetin O-glycoside that consists of quercetin  attached to a alpha-L-rhamnopyranosyl moiety at position 4' and a beta-D-allopyranosyl moiety at position 3 via a glycosidic linkage. Isolated from Acacia pennata, it exhibits inhibitory activity against cyclooxygenase 1 and 2.


name: quillaic acid alpha-L-Arap-(1->4)-alpha-L-Arap-(1->3)-beta-D-Xylp-(1->4)-alpha-L-Rhap-(1->2)-beta-D-fucopyranosyl ester

description: A triterpenoid saponin that is the pentasaccharide derivative of quillaic acid. Isolated from the roots of Gypsophila oldhamiana, it exhibits immunomodulatory activity.


RAVENIC ACID

A member of the class of pyrrolidin-2-ones that is pyrrolidine-2,4-dione substituted at position 3 by a deca-2,4,6,8-tetraen-1-ylidene group which in turn is substituted by a hydroxy and methyl substituents at positions 1 and 4 respectively. It is an antibiotic isolated from Penicillium sp.


rediocide A

A diterpenoid of the class of daphnane-type terpenes. It is isolated from Trigonostemon reidioides and has been shown to exhibit insecticidal activity.


rediocide C

A diterpenoid of the class of daphnane-type terpenes. It is isolated from Trigonostemon thyrsoideum and has been shown to exhibit acaricidal activity.


rediocide G

A diterpenoid of the class of daphnane-type terpenes. Isolated from Trigonostemon reidioides, it exhibits cytotoxicity against various cancer cell lines.


REMANGIFLAVANONE A

A trihydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7 and 4' and a lavandulyl group at position 8. Isolated from Physena madagascariensis, it exhibits antibacterial activity.


REMANGIFLAVANONE B

A tetrahydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7, 2' and 4' and a lavandulyl group at position 8. Isolated from Physena madagascariensis, it exhibits antibacterial activity.


RESPIRANTIN

A cyclodepsipeptide isolated from Streptomyces and Kitasatospora and has been shown to exhibit antimicrobial and antineoplastic activity.


A epsilon-lactone that is  hexano-6-lactone substituted by a methyl group at position 3.


cyclodepsipeptide 2

An 18-membered cyclodepsipeptide having a 3-formamido-2-hydroxybenzoyl group attached to the amino terminus. It is isolated from an Alaskan Kitasatospora sp. and exhibits antineoplastic activity.


pyranojacareubin

An organic heteropentacyclic compound that is 2H,6H,10H-dipyrano[3,2-b:2',3'-i]xanthene substituted by hydroxy groups at positions 5 and 12, geminal methyl groups at positions 2 and 10 and an oxo group at position 6. Isolated from Calophyllum blancoi it exhibits antiviral activity.


RHINACANTHIN C

A naphthoquinone isolated from Rhinacanthus nasutus and has been shown to exhibit antiviral activity.


rhinacanthin D

A carboxylic ester obtained by the formal condensation of 2-hydroxy-3-(3-hydroxy-2,2-dimethylpropyl)naphthalene-1,4-dione with 1,3-benzodioxole-5-carboxylic acid. Isolated from Rhinacanthus nasutus, it exhibits antiviral activity.


rhodiocyanoside A

A  cyanogenic glycoside that is (2Z)-2-methylbut-2-enenitrile attached to a beta-D-glucopyranosyloxy at position 4. Isolated from Rhodiola quadrifida, it exhibits anti-allergic activity.


rhuscholide A

A member of the class of 1-benzofurans that is 1-benzofuran-2(3H)-one substituted by a hydroxy group at position 5, a propan-2-ylidene group at position 3 and a (2E,6E,10E)-3,7,11,15-tetramethylhexadeca-2,6,10,14-tetraen-1-yl group at position 7. Isolated from Rhus chinensis, it exhibits anti-HIV activity.


robustaflavone 7,4',7''-trimethyl ether

A  biflavonoid that is the 7,4',7''-trimethyl ether derivative of robustaflavone. Isolated from  Selaginella doederleinii, it exhibits cytotoxic activity against human cancer cell lines.


ROCAGLAMIDE

An organic heterotricyclic compound that is 2,3,3a,8b-tetrahydro-1H-benzo[b]cyclopenta[d]furan substituted by hydroxy groups at positions 1 and 8b, methoxy groups at positions 6 and 8, a 4-methoxyphenyl group at position 3a, a phenyl group at position 3 and a N,N-dimethylcarbamoyl group at position 1. Isolated from Aglaia odorata and Aglaia duperreana, it exhibits antineoplastic activity.


maculosin

A  homodetic cyclic peptide that is a dipeptide composed of L-proline and L-tyrosine joined by peptide linkages.


ROSTRATIN A

An organic disulfide  isolated from the whole broth of the marine-derived fungus Exserohilum rostratum and has been shown to exhibit antineoplastic activity.


ROSTRATIN B

An organic disulfide isolated from the whole broth of the marine-derived fungus Exserohilum rostratum and has been shown to exhibit antineoplastic activity.


rotundifolioside A

A  triterpenoid saponin that consists of urs-11-ene substituted by an epoxy group across positions 13 and 28, a hydroxy group at position 16 and a beta-D-xylopyranosyl-(1->2)-beta-D-glucopyranosyl-(1->2)-beta-D-glucopyranosyloxy group at position 3 (the 3beta,16alpha stereoisomer). Isolated from the fruits of Bupleurum rotundifolium, it exhibits antiproliferative activity against cancer cells.


rotundifolioside H

A triterpenoid saponin that consists of urs-11-ene substituted by an epoxy group across positions 13 and 28, a hydroxy groups at position 16 and 23 and a beta-D-xylopyranosyl-(1->2)-beta-D-glucopyranosyl-(1->2)-beta-D-fucopyranosyloxy group at position 3 (the 3beta,16alpha stereoisomer). Isolated from the fruits of Bupleurum rotundifolium, it exhibits antiproliferative activity against cancer cells.


rotundifolioside I

A triterpenoid saponin that consists of urs-11-ene substituted by an epoxy group across positions 13 and 28, a hydroxy group at position 16 and a beta-yl beta-D-xylopyranosyl-(1->2)-beta-D-glucopyranosyl-(1->2)-beta-D-fucopyranosyloxy residue at position 3 (the 3beta,16alpha stereoisomer). Isolated from the fruits of Bupleurum rotundifolium, it exhibits antiproliferative activity against cancer cells.


rotundifolioside J

A triterpenoid saponin that consists of urs-11-ene substituted by an epoxy group across positions 13 and 28, a hydroxy group at position 16 and a alpha-L-rhamnopyranosyl-(1->2)-beta-D-glucopyranosyl-(1->2)-beta-D-fucopyranosyloxy residue at position 3 (the 3beta,16alpha stereoisomer). Isolated from the fruits of Bupleurum rotundifolium, it exhibits antiproliferative activity against cancer cells.


RUBRAXANTHONE

A member of the class of xanthones that is 9H-xanthen-9-one substituted by hydroxy groups at positions 3, 6 and 8, a geranyl group at position 1 and a methoxy group at position 2. Isolated from  Mesua and Garcinia dioica, it exhibits antibacterial and cytotoxic activities.


rubriflordilactone B

A terpene lactone that is a bisnortriterpenoid possessing an aromatic ring. It is isolated from the leaves and stems of  Schisandra rubriflora and has been shown to exhibit anti-HIV-1 activity.


name: Rubrisandrin A(2:1 Inseparable mixture of regeoisomers)


weigelic acid

A pentacyclic triterpenoid that is urs-12-ene substituted by hydroxy groups at positions 1, 2, 3 and 23 and a carboxy group at position 28 (the 1beta,2alpha,3alpha stereoisomer). Isolated from  Weigela subsessilis, it exhibits anticomplement activity against complement induced hemolysis.


A member of the class of guanidines isolated from the culture mycelium of the fungal strain Aphanoascus fulvescens and has been shown to exhibit inhibitory activity against cathepsin B and L.


A member of the class of  guanidines isolated from the culture mycelium of the fungal strain Aphanoascus fulvescens and has been shown to exhibit inhibitory activity against  cathepsin B and L.


TUBOCAPSANOLIDE A

A  withanolide that is 5beta,6beta:16alpha,17alpha-diepoxywitha-2,24-dienolide substituted by a hydroxy group at position 4 and an oxo group at position 1. Isolated from Tubocapsicum anomalum, it exhibits cytotoxic activity.


20-HYDROXYTUBOCAPSANOLIDE A

A withanolide that is the 20-hydroxy derivative of tubocapsanolide A. Isolated from Tubocapsicum anomalum, it exhibits cytotoxic activity.


23-HYDROXYTUBOCAPSANOLIDE A

A withanolide that is the 23-hydroxy derivative of tubocapsanolide A. Isolated from Tubocapsicum anomalum, it exhibits cytotoxic activity.


tubocapsanolide F

A  withanolide that is 5,6:22,26-diepoxyergosta-2,24-diene-1,26-dione substituted by hydroxy groups at positions 4 and 17 (the 4beta,5beta,6beta,22R stereoisomer). Isolated from Tubocapsicum anomalum, it exhibits cytotoxic activity.


17alpha-hydroxywithanolide D

A withanolide that is the 17alpha-hydroxy derivative of withanolide D. Isolated from Tubocapsicum anomalum and Withania somnifera, it exhibits cytotoxic activity.


wrightiamine A

A steroid alkaloid isolated from Wrightia javanica and has been shown to exhibit antineoplastic activity.


XANTHOHUMOL

A member of the class of chalcones that is trans-chalcone substituted by hydroxy groups at positions 4, 2' and 4', a methoxy group at position 6' and a prenyl group at position 3'. Isolated from Humulus lupulus, it induces apoptosis in human malignant glioblastoma cells.


DIHYDROXANTHOHUMOL

A member of the class of dihydrochalcones that is the alpha,beta-dihydro derivative of xanthohumol. Isolated from Humulus lupulus, it exhibits inhibition of NO production.


oxygenated xanthohumol

A member of the class of chalcones that is trans-chalcone substituted by hydroxy groups at positions 4, 2' and 4', a methoxy group at position 6' and a 2-hydroxy-3-methoxy-3-methylbutyl group at position 3'. It has been isolated as a racemate from Humulus lupulus and has been shown to exhibit inhibitory activity against NO production.


XANTHOHUMOL B

A member of the class of chalcones that is (2E)-1-(3,4-dihydro-2H-chromen-6-yl)-3-(4-hydroxyphenyl)prop-2-en-1-one substituted by hydroxy groups at position 3 and 5, a methoxy group at position 7 and geminal methyl groups at position 2. It has been isolated as a racemate from Humulus lupulus and has been shown to exhibit inhibitory activity against nitric oxide production.


XANTHOHUMOL D

A member of the class of chalcones that is trans-chalcone substituted by hydroxy groups at positions 4, 2' and 4', a methoxy group at position 6' and a 2-hydroxy-3-methylbut-3-en-1-yl group at position 3'. It has been isolated as a racemate from Humulus lupulus and has been shown to exhibit inhibitory activity against NO production.


xenovulene A

A sesquiterpenoid based on a humulene skeleton. It is isolated from Sarocladium strictum and has been shown to exhibit inhibitory activity against GABA receptor.


xylocarpin J

A limonoid isolated from Xylocarpus granatum and has been shown to exhibit antineoplastic activity.


UCS1025 A

An organic heterotricyclic compound that incorporates a lactam and a gamma-lactone as part of the cyclic system which in turn is attached to a (2,4a,8a-trimethyl-octahydronaphthalen-1-yl)carbonyl group at position 7. It is isolated from Acremonium sp. KY4917 and exhibits antibacterial activity.


A lactone which is 9-methyl-1,5-dioxonane-2,6-dione substituted by a benzyl group at position 8, a [(3-hydroxy-4-methoxypyridine-2-yl)carbonyl]amino group at position 3 and an isobutyryloxy group at position 7. It is isolated from the mycelia cake of Streptomyces sp. 517-02 and exhibits potent antifungal activity.


A lactone which is 9-methyl-1,5-dioxonane-2,6-dione substituted by a benzyl group at position 8, a [(3-hydroxy-4-methoxypyridine-2-yl)carbonyl]amino group at position 3 and a (2-methylbut-2-enoyl)oxy group at position 7. It is isolated from the mycelia cake of Streptomyces sp. 517-02 and exhibits potent antifungal activity.


A lactone which is 9-methyl-1,5-dioxonane-2,6-dione substituted by a benzyl group at position 8, a [(3-hydroxy-pyridine-2-yl)carbonyl]amino group at position 3 and an isobutyryloxy group at position 7. It is isolated from the mycelia cake of Streptomyces sp. 517-02 and exhibits potent antifungal activity.


A member of the class of ureas that is urea substituted by a (3beta,22E)-ergosta-4,6,8(14),22-tetraen-3-yl  group at position 1. Isolated from the fruit bodies of the fungus Chlorophyllum molybdites, it exhibits cytotoxicity against Kato III cells.


vaccihein A

A benzoate ester that is methyl (2,4-dihydroxyphenyl)acetate attached to a (4-hydroxy-3,5-dimethoxybenzoyl)oxy group. Isolated from Vaccinium ashei, it exhibits antioxidant activity.


VARIECOLIN

A natural product found in several Aspergillus species.


variecolorquinone A

An dihydroxyanthraquinone that is 1,6-dihydroxy-9,10-anthraquinone which is substituted by a methoxy group at position 8, a methyl group at position 3 and a [(2S)-2,3-dihydroxypropoxy]carbonyl group at position 2. Isolated from the fungus Aspergillus variecolor, it exhibits cytotoxic activity.


variecolorquinone B

An aromatic ester that is methyl 2-hydroxy-4-methylbenzoate attached to a (6-methoxy-1,4-benzoquinon-2-yl)methyl group at position 6. Isolated from Aspergillus variecolor, it exhibits cytotoxic activity.


VEDELIANIN

A stilbenoid derivative isolated from Macaranga alnifolia and Macaranga alnifolia and has been shown to exhibit cytotoxic activity.


VENTURAMIDE A

An eighteen-membered homodetic cyclic peptide which is isolated from Oscillatoria sp. and exhibits antimalarial activity against the W2 chloroquine-resistant strain of the malarial parasite, Plasmodium falciparum.


VENTURAMIDE B

An eighteen-membered homodetic cyclic peptide which is isolated from  Oscillatoria sp. and exhibits antimalarial activity against the W2 chloroquine-resistant strain of the malarial parasite, Plasmodium falciparum.


VERONGAMINE

A  monocarboxylic acid amide that is N-[2-(1H-imidazol-4-yl)ethyl]propanamide substituted by a hydroxyimino group at position 2 and a 3-bromo-4-methoxyphenyl group at position 3. A bromotyrosine derivative isolated from the marine sponge Verongula gigantea, it exhibits histamine-H3 antagonist activity.


(+)-alpha-viniferin

A nine-membered macrocycle that incorporates three 6-hydroxy-2-(4-hydroxyphenyl)-2,3-dihydro-1-benzofuranyl moieties as part of the cyclic skeleton. It is isolated from Caragana chamlague Lamarck and exhibits significant inhibitory effect towards the enzyme acetylcholinesterase (EC 3.1.1.7).


vinylamycin

A 15-membered cyclodepsipeptide isolated from Streptomyces sp.M1982-63F1. It exhibits moderate activity against Gram-positive bacteria.


An abietane diterpenoid that is 5-dehydrohorminone in which the hydroxy group at position 12 is replaced by a methoxy group. Isolated from the roots of Salvia multicaulis, it exhibits antitubercular activity.


An abietane diterpenoid that is the acetate ester of 12-methyl-5-dehydrohorminone. Isolated from the roots of Salvia multicaulis, it exhibits antitubercular activity.


6-O-methyl-2-deprenylrheediaxanthone B

An organic heterotetracyclic compound that is 1,2-dihydro-6H-furo[2,3-c]xanthene substituted by hydroxy groups at positions 5 and 10, a methoxy group at position 9 and methyl groups at positions 1, 1 and 2 and an oxo group at position 6. Isolated from the stem barks of Garcinia vieillardii, it exhibits antioxidant activity.


VIEILLARDIXANTHONE

A member of the class of xanthones  that is xanthone substituted by hydroxy groups at positions 1, 5 and 6, a methoxy group at position 3 and a 3-methylbut-1-en-2-yl group at position 4. Isolated from the stem barks of Garcinia vieillardii, it exhibits antioxidant activity.


4-methylaeruginoic acid

A 1,3-thiazole that is 4,5-dihydro-1,3-thiazole-4-carboxylic acid substituted by a 2-hydroxyphenyl group at position 2 and a methyl group at position 4 (the 4S stereoisomer). It is isolated from the culture broth of Streptomyces sp.KCTC9303 and exhibits potent cytotoxic activites against number of tumour cell lines.


A member of the class of pterocarpans that is (6aR,11aR)-pterocarpan substituted by a hydroxy group at position 9, a methoxy group at position 3 and a prenyl group at position 2. Isolated from  Erythrina glauca and Erythrina burttii, it exhibits anti-HIV activity.


A disaccharide derivative that consists of 5,7-dihydroxy-6-methoxy-2-methylchromone substituted by a rutinosyl group at position 7 via a glycosidic linkage. Isolated from  Crossosoma bigelovii, it exhibits antineoplastic activity.


A disaccharide derivative that consists of 5-hydroxy-2-methylchromone substituted by a rutinosyl group at position 7 via a glycosidic linkage. Isolated from Crossosoma bigelovii, it exhibits antineoplastic activity.


A pyridine alkaloid that is pyridine N-oxide substituted by a methyldisulfanyl group at position 2. Isolated from Allium stipitatum, it exhibits antibacterial activity.


michaolide A

A cembrane diterpenoid with cytotoxic activity isolated from the soft coral Lobophytum michaelae.


michellamine A

A dimeric isoquinoline alkaloid isolated from Ancistrocladus abbreviatus and has been shown to exhibit anti-HIV activity.


MICROCLAVATIN

A macrocyclic diterpenoid isolated from the soft coral Sinularia microclavata and has been shown to exhibit cytotoxic activities against tumor cell lines.


MICROSPINOSAMIDE

A cyclodepsipeptide isolated from the marine sponge Sidonops microspinosa and has been shown to exhibit anti-HIV-1 activity.


MIGRASTATIN

A 14-membered macrolide which is isolated from Streptomyces sp.MK929-43F1 and inhibits cell migration of human esophageal cancer EC17 cells and mouse melanona B16 cells.


MILLEWANIN G

A member of the class of 7-hydroxyisoflavones that is isoflavone substituted by hydroxy groups at positions 5, 7, 3' and 4', a prenyl group at position 8 and a 2-hydroxy-3-methylbut-3-enyl moiety at position 6. Isolated from the leaves of Millettia pachycarpa, it exhibits antiestrogenic activity.


millewanin H

A hydroxyisoflavone that is isoflavone substituted by hydroxy groups at positions 5, 7, 3' and 4', a prenyl group at position 6 and a 2-hydroxy-3-methylbut-3-enyl moiety at position 8. Isolated from the leaves of Millettia pachycarpa, it exhibits antiestrogenic activity.


mimosifolenone

A cyclic ketone that is cyclohept-2-en-1-one substituted by a hydroxy group at position 5, a methoxy group at position 6 and a 2-phenylethenyl group at position 5 (the 5R,6R stereoisomers). Isolated from the rootwood of Aeschynomene mimosifolia, it exhibits cytotoxic towards human cancer cell lines.


MINHERYIN G

An ent-kaurane diterpenoid isolated from Isodon henryi and has been shown to exhibit cytotoxic activity.


QUERCETIN GLUCURONIDE

A quercetin O-glycoside that consists of quercetin attached to a beta-D-glucuronopyranosyl moiety at position 3 via a glycosidic linkage. Isolated from Salvia and Phaseolus vulgaris, it exhibits antioxidant and antidepressant activities.


MONODICTYOCHROMONE A

A chromanone isolated from the marine derived fungus Monodictys putredinis and exhibits inhibitory activity against P450.


MONODICTYOCHROMONE B

A  chromanone isolated from the marine derived fungus Monodictys putredinis and exhibits inhibitory activity against P450.


MONODICTYSIN B

A member of the class of xanthones that is 1,2,3,4,4a,9a-hexahydro-9H-xanthen-9-one substituted by hydroxy groups at positions 1, 4 and 8 and methyl groups at positions 3 and 4a (the 1S,3S,4S,4aS,9aS stereoisomer). Isolated from the marine algicolous fungus Monodictys putredinis, it exhibits antineoplastic activity.


MONODICTYSIN C

A member of the class of xanthones that is 1,2,3,4,4a,9a-hexahydro-9H-xanthen-9-one substituted by hydroxy groups at positions 1, 4 and 8, methyl groups at positions 3 and 4a and a methoxy group at position 6 (the 1S,3S,4S,4aS,9aS stereoisomer). Isolated from the marine algicolous fungus Monodictys putredinis, it exhibits antineoplastic activity.


monotesone A

A trihydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7 and 3' and a prenyloxy group at position 4'. Isolated from Monotes engleri, it exhibits antifungal activity.


morellic acid

A dioxo monocarboxylic acid derived from morellin by oxidation of the aldehyde group to the corresponding carboxy group. Isolated from Garcinia morella and Garcinia hanburyi, it exhibits antineoplastic, antibacterial and anti-HIV activity.


8,8a-epoxymorellic acid

An epoxide that is the 8,8a-epoxy derivative of morellic acid. Isolated from  Garcinia hanburyi it exhibits cytotoxic and anti-HIV activity..


MOROMYCIN A

An angucycline antibiotic that consists of a tetrangomycin skeleton linked to deoxy sugars through C-glycosidic and O-glycosidic bonds at positions 9 and 3 respectively. It is isolated from Streptomyces sp.KY002 and exhibits cytotoxicity against human lung cancer and MCF-7 human breast cancer cells.


MOROMYCIN B

An angucycline that consists of tetrangomycin linked to a deoxy sugar moiety at position 9 via a C-glycosidic bond. It is isolated from Streptomyces sp.KY002 and exhibits cytotoxicity against human lung cancer and MCF-7 human breast cancer cells.


MOTUALEVIC ACID A

An enamide obtained by the formal condensation of the amino group of glycine with the carboxy group of 14,14-dibromotetradeca-2,13-dienoic acid (the 2E stereoisomer). It is isolated from the marine sponge  Siliquariaspongia sp. and exhibits antibacterial properties.


motualevic acid F

A 2H-azirine that is 2H-azirene-2-carboxylic acid substituted by a 13,13-dibromotrideca-1,12-dien-1-yl group at position 3 (the 2R stereoisomer). It is isolated from the marine sponge Siliquariaspongia sp. and exhibits antibacterial properties.


MULTICAULIN

A diterpenoid that is phenanthrene substituted by a methoxy group at position 6, methyl groups at position 1 and 2 and an isopropyl group at position 7. A norabietane derivative, it is isolated from the roots of Salvia multicaulis and exhibits antitubercular activity.


A diterpenoid that is multicaulin in which the methoxy group at position 12 is replaced by a hydroxy group. A norabietane derivative, it is isolated from the roots of Salvia multicaulis and exhibits antitubercular activity.


MULTIORTHOQUINONE

A diterpenoid that is phenanthrene-3,4-dione substituted by a methoxy group at position 6, a methyl groups at positions 7 and 8 and an isopropyl group at position 2. A norabietane derivative, it is isolated from Salvia multicaulis and exhibits antitubercular activity.


MAGNOFLORINE

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


DEMETHYLMULTIORTHOQUINONE

A diterpenoid that is multiorthoquinone in which the methoxy group at position 12 is replaced by a hydroxy group. A norabietane derivative, it is isolated from Salvia multicaulis and exhibits antitubercular activity.


MULTIPLOLIDE A

A 10-membered lactone obtained from 10-methyl-9,10-dihydro-2H-oxecin-2-one by the epoxidation of the double bond at position 3-4 and cis-dihydroxylation of the double bond at position 7-8. Multiplolide A was first isolated from the fungus Xylaria multiplex BCC 1111. It shows antifungal activity against Candida albicans.


MULTIPLOLIDE B

A 10-membered lactone obtained from 10-methyl-9,10-dihydro-2H-oxecin-2-one by the epoxidation of the double bond at position 3-4 and cis-dihydroxylation of the double bond at position 7-8, with further acylation of the hydroxy group at position 8 by a but-2-enoyl group. Multiplolide B was first isolated from the fungus Xylaria multiplex BCC 1111. It shows antifungal activity against Candida albicans. The epoxide group has cis-configuration, but its configuration relative to the other substituents was not established.


A biflavonoid obtained by coupling of 8,3'-dihydroxy-7,4',5'-trimethoxyflavan and 8-hydroxy-7,3',4',5'-tetramethoxyflavan resulting in a bond between C-5 positions of the two chromene rings. Isolated from Muntingia calabura, it exhibits antineoplastic activity.


A biflavonoid obtained by coupling of two units of 8,3'-dihydroxy-7,4',5'-trimethoxyflavan resulting in a bond between C-5 positions of the two chromene rings. Isolated from Muntingia calabura, it exhibits antineoplastic activity.


muqubilone

A sesterterpenoid isolated from Red Sea sponge Diacarnus erythraeanus and has been shown to exhibit anti-HSV-1 activity.


mustakone

A sesquiterpenoid isolated from Cyperus rotundus and Cyperus articulatus and has been shown to exhibit antiplasmodial activity.


myrciacitrin I

A flavanone glycoside that is (2S)-flavanone substituted by methyl groups at positions 6 and 8, hydroxy groups at positions 5, 2' and 5' and a beta-D-glucopyranosyloxy residue at position 7. Isolated from the leaves of Myrcia multiflora, it exhibits inhibitory activity against alpha-glucosidase and aldose reductase.


myrciacitrin II

A flavanone glycoside that is (2S)-flavanone substituted by methyl groups at positions 6 and 8, hydroxy groups at positions 5 and 2', a methoxy group at position 5' and a beta-D-glucopyranosyloxy residue at position 7. Isolated from the leaves of Myrcia multiflora, it exhibits inhibitory activity against alpha-glucosidase and aldose reductase.


myrciacitrin III

A flavanone glycoside that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7 and 5', methyl group at positions 6 and 8 and a beta-D-glucopyranosyloxy residue at position 2'. Isolated from the leaves of Myrcia multiflora, it exhibits inhibitory activity against aldose reductase.


myrciacitrin IV

A flavanone glycoside that is (2S)-flavanone substituted by hydroxy groups at positions 5, 2' and 5', methyl groups at positions 6 and 8 and a (6''-O-p-coumaroyl)-beta-D-glucopyranosyloxy residue at position 7. Isolated from the leaves of Myrcia multiflora, it exhibits inhibitory activity against aldose reductase.


myrciacitrin V

A flavanone glycoside that is (2S)-flavanone substituted by hydroxy groups at positions 5, 2' and 5', methyl groups at positions 6 and 8 and a (6''-O-p-hydroxybenzoyl)-beta-D-glucopyranosyloxy residue at position 7. Isolated from the leaves of Myrcia multiflora, it exhibits inhibitory activity against aldose reductase.


myriaporone 3

A member of the class of oxanes isolated from the Mediterranean bryozoan Myriapora truncata and has been shown to exhibit inhibitory activity against murine leukemia cells.


myricitrin-5-methyl ether

A monomethoxyflavone that is the 5-methyl ether derivative of myricitrin. Isolated from Rhododendron yedoense var poukhanense, it exhibits antioxidant activity.


myrothenone A

An alicyclic ketone which is 3-oxocyclopent-1-ene substituted by a formamido group at position 1 as well as vinyl and hydroxy groups at position 4. It is isolated from a marine derived fungus Myrothecium sp. and acts as an inhibitor of tyrosinase enzyme (EC 1.14.18.1).


A triterpenoid saponin isolated from Myrsine australis and Ardisia japonica and has been shown to exhibit antineoplastic activity.


myrsinoic acid A

A monohydroxybenzoic acid that is 4-hydroxybenzoic acid substituted by a geranyl group at position 3 and a prenyl group at position 5. Isolated from Myrsine seguinii, it exhibits anti-inflammatory activity.


myrsinoic acid B

A member of the class of 1-benzofurans that is 2,3-dihydro-1-benzofuran substituted by a carboxy group at position 5, a 1',5'-dimethyl-1'-hydroxy-4'-hexenyl group at position 2 and a prenyl group at position 7. Isolated from Myrsine seguinii, it exhibits anti-inflammatory activity.


myrsinoic acid C

A member of the class of chromanes that is 3,4-dihydro-2H-chromene substituted by a carboxy group at position 6, a hydroxy group at position 3, a methyl and a 4-methylpent-3-en-1-yl group at position 2 and a prenyl group at position 8 (the 2S,3S stereoisomer). Isolated from in Myrsine seguinii, it exhibits anti-inflammatory activity.


myrsinoic acid F

A member of the class of benzofurans that is 2,3-dihydro-1-benzofuran substituted by a carboxy group at position 5, a prenyl group at position 7 and a 6-methylhepta-2,5-dien-2-yl group at position 2. Isolated from Myrsine seguinii, it exhibits anti-inflammatory activity.


schiprolactone A

A tetracyclic triterpenoid  isolated from Schisandra propinqua and Schisandra henryi. It has been shown to exhibit cytotoxic activity against Leukemia cells.


SCHISANLACTONE A

A tetracyclic triterpenoid isolated from Schisandra and Kadsura longipedunculata. It has been shown to exhibit inhibitory activity against HIV protease.


SCHISANWILSONENE A

A sesquiterpenoid isolated from Schisandra wilsoniana and has been shown to exhibit anti-HBV activity.


SCHIZOLAENONE A

A trihydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7 and 4', a geranyl group at position 3' and a prenyl group at position 6. Isolated from  Schizolaena hystrix, it exhibits cytotoxicity against ovarian cancer cell line.


SCHIZOLAENONE B

A tetrahydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7, 4' and 5', a geranyl group at position 3' and a prenyl group at position 6. Isolated from Schizolaena hystrix, it exhibits cytotoxicity against ovarian cancer cell line.


SCHWEINFURTHIN E

A stilbenoid that is the 5-O-methyl ether derivative of vedelianin. Isolated from Macaranga alnifolia, it exhibits cytotoxic activity.


SCHWEINFURTHIN F

A stilbenoid isolated from Macaranga alnifolia and has been shown to exhibit cytotoxic activity.


SCHWEINFURTHIN G

A stilbenoid that is the 3-deoxy derivative of vedelianin. Isolated from Macaranga alnifolia, it exhibits cytotoxic activity.


SCHWEINFURTHIN H

A stilbenoid isolated from  Macaranga alnifolia and has been shwon to exhibit cytotoxic activity.


sciscllascilloside E-1

A triterpenoid saponin isolated from Scilla scilloides and has been shown to exhibit anti-tumour activity.


scleropyric acid

A straight-chain fatty acid that is heptadecanoic acid with a terminal double bond and a triple bond at position 12. Isolated from the twigs of Scleropyrum wallichianum, it exhibits antimycobacterial and antiplasmodial activities.


SCOPARIC ACID A

A diterpenoid isolated from Scoparia dulcis and has been shown to exhibit inhibitory activity against beta-glucuronidase from bovine liver.


scroside D

A disaccharide derivative that consists of hydroxytyrosol in which the alcoholic hydroxy group is glycosylated with a 3-O-beta-D-glucopyranosyl-D-glucopyranosyl residue. Isolated from Picrorhiza scrophulariiflora, it exhibits antioxidant activity.


SCUTEBARBATINE F

A  diterpene alkaloid of group of neo-clerodanes isolated from the whole plants of Scutellaria barbata and has been shown to exhibit neoplastic activity.


scutebarbatine D

A diterpene alkaloid of group of neo-clerodanes isolated from the whole plants of Scutellaria barbata and has been shown to exhibit neoplastic activity.


magnoshinin

A  neolignan  that consists of 1,2-dihydronaphthalene substituted by a 2,4,5-trimethoxyphenyl group at position 1 (the 1S,2R stereoisomer), methyl groups at positions 2 and 3, and methoxy groups at positions 5, 7 and 8 respectively.


SCUTIANTHRAQUINONE A

A member of the class of hydroxyanthraquinones isolated from the bark of Scutia myrtina. It has been shown to exhibit antiproliferative and antimalarial activities.


scytalidamide A

A homodetic cyclic peptide which is a heptapeptide isolated from a marine fungus Scytalidium sp. It exhibits significant cytotoxicity against human colon carcinoma tumour cell line HCT-116.


secoaggregatalactone A

An enoate ester obtained by the formal condensation (2E)-2-[(1S)-1-hydroxy-2-oxopropyl]tridec-2-enoic acid with methanol. Isolated from Lindera aggregata, it exhibits apoptotic activity against human hepatoma hep G2 cells.


A diterpenoid of the class of secoisopimarane isolated from Salvia cinnabarina and has been shown to exhibit antispasmodic, hypotensive and antibacterial activities.


selinone

A dihydroxyflavanone that is 5,7-dihydroxyflavanone substituted by a prenyloxy group at position 4' (the 2S stereoisomer). Isolated from Selinum vaginatum and Monotes engleri, it exhibits antifungal activity.


semicochliodinol A

A bisindole alkaloid that is quinone bearing hydroxy substituents at positions 2 and 5 and two indol-3-yl groups at positions 3 and 6, one of which is carrying a prenyl group at position 5. Isolated from the culture broth of  Chrysosporium merdarium, it acts as an inhibitor of HIV-1 protease and EGF-R protein tyrosine kinase.


semicochliodinol B

A bisindole alkaloid that is quinone bearing hydroxy substituents at positions 2 and 5 and two indol-3-yl groups at positions 3 and 6, one of which is carrying a prenyl group at position 6. Isolated from the culture broth of Chrysosporium merdarium, it acts as an inhibitor of HIV-1 protease and EGF-R protein tyrosine kinase.


A member of the class of coumarins  that consists of coumarin substituted by a senecioyloxymethyl group at position 4 and methoxy groups at positions 6 and 7. Isolated from Crinum latifolium, it exhibits anti-angiogenic activity.


E-senegasaponin a

The E-isomer of senegasaponin a.


Z-senegasaponin a

The Z-isomer of senegasaponin a.


E-senegasaponin b

The E-isomer of senegasaponin b.


Z-senegasaponin b

The Z-isomer of senegasaponin b.


senegin III

A triterpenoid saponin isolated from Polygala senega var latifolia and has been shown to exhibit hypoglycemic activity.


mahuannin D

A proanthocyanidin isolated form Ephedra sinica.


sesamin

A lignan that consists of tetrahydro-1H,3H-furo[3,4-c]furan substituted by 1,3-benzodioxole groups at positions 1 and 4 (the 1S,3aR,4S,6aR stereoisomer). Isolated from Cinnamomum camphora, it exhibits cytotoxic activity.


A guaiane sesquiterpenoid that is guaia-1,11-diene substituted by a alpha-hydroperoxy group at position 10. Isolated from Pogostemon cablin, it exhibits trypanocidal activity.


A guaiane sesquiterpenoid that is guaia-10(15),11-diene substituted by a alpha-hydroperoxy group at position 1. Isolated from Pogostemon cablin, it exhibits trypanocidal activity.


A guaiane sesquiterpenoid that is guaia-1(10),11-diene substituted by a alpha-hydroperoxy group at position 15. Isolated from Pogostemon cablin, it exhibits trypanocidal activity.


SESTERSTATIN 1

A scalarane sesterterpenoid isolated from the marine sponge Hyrtios erectus and has been shown to exhibit antineoplastic activity.


A member of the class of isocoumarins isolated from the marine fungus Alternaria tenuis and has been shown to exhibit cytotoxic activities.


SIAMENOL

A carbazole alkaloid that is 9H-carbazole substituted by a hydroxy group at position 2, a methyl group at position 6 and a prenyl group at position 3. Isolated from Murraya siamensis, it exhibits anti-HIV activity.


sibiskoside

A monoterpene glycoside that is geraniol-5,10-olide glycosylated at position 1 by a beta-D-glucopyranosyl group. Isolated from the aerial parts of Sibiraea angustata, it exhibits anti-obesity activity.


SIGMOIDIN A

A  tetrahydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7, 3' and 4' and prenyl groups at positions 2' and 5'. Isolated from Erythrina sigmoidea, it exhibits anti-inflammatory and antioxidant activities.


SIGMOIDIN B

A tetrahydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 5, 7, 3' and 4' and a prenyl group at position 5'. Isolated from Erythrina sigmoidea, it exhibits anti-inflammatory and antioxidant activities.


SILVESTROL

An organic heterotricyclic compound that consists of a  2,3,3a,8b-tetrahydro-H-benzo[b]cyclopenta[d]furan framework substituted by hydroxy groups at positions C-1 and C-8b, a methoxycarbonyl group at C-2, a phenyl group at C-3, a 4-methoxyphenyl group at C-3a, a methoxy group at C-8 and a 1,4-dioxan-2-yloxy group at position C-6 which in turn is substituted by a methoxy group at position 3 and a 1,2-dihydroxyethyl group at position 6. Isolated from Aglaia silvestris, it exhibits antineoplastic activity.


An organic heterotricyclic compound that is a 5'''-epimer of silvestrol. Isolated from Aglaia silvestris, it exhibits antineoplastic activity.


SIMALIKALACTONE D

A quassinoid isolated from Quassia amara and Quassia africana. It has been shown to exhibit  antimalarial, cytotoxic and antiviral activities.


sinularia glycoside

A steroid saponin that is 3,7,16-trihydroxyergosta-5,24(28)-diene substituted by a 4-O-acetyl-6-deoxy-alpha-L-galactopyranosyl residue at position 3 via a glycosidic linkage (the 3beta,7beta,16beta stereoisomer). Isolated from Sinularia crispa, it exhibits spermatostatic activity.


malaoxon

A racemate comprising equimolar amounts of (R) and (S)-malaoxon. It is the active insecticide of the proinsecticide malathion.


yahyaxanthone

A member of the class of pyranoxanthones that is 3H,7H-pyrano[2,3-c]xanthen-7-one substituted by a hydroxy group at position 6, methoxy groups at positions 5, 8, 10 and 11 and geminal methyl groups at position 3. Isolated from Garcinia rigida, it exhibits cytotoxic activity.


YINYANGHUO A

An extended flavonoid that is 2',2'-dimethyl-2'H,4H-2,6'-bichromen-4-one substituted by hydroxy groups at positions 5 and 7 and a 2-hydroxy-3-methylbut-3-en-1-yl group at position 8'. Isolated from Epimedium sagittatum, it exhibits inhibitory activity against platelet aggregation.


YINYANGHUO B

A trihydroxyflavone that is flavone substituted by hydroxy groups at positions 5, 7 and 4', a 2-hydroxy-3-methylbut-3-en-1-yl group at position 3' and a prenyl group at position 5'. Isolated from Epimedium sagittatum, it exhibits inhibitory activity against platelet aggregation.


A 18-membered cyclodepsipeptide isolated from the culture broth of Flexibacter. It exhibits potent inhibitory activity against human leukocyte elastase (EC 6.5.1.1.).


A cinnamate ester obtained by the formal condensation of the carboxy group of trans-cinnamic acid with the 9-hydroxy group of 7,9-dihydroxy-8,10-dimethyltrideca-2,4-dienamide (the 4R,5S,6R,7R,9E,11Z stereoisomer). It is obtained from the fermentation broth of Bacillus sp.YL-03709B and exhibits antifungal activity.


Ys-II

A spirostanyl glycoside that is smilagenin attached to a beta-D-glucopyranosyl-(1->2)-beta-D-galactopyranosyl residue at position 3 via a glycosidic linkage. Isolated from Yucca gloriosa and Yucca guatemalensis, it exhibits antifungal activity.


Ys-IV

A spirostanyl glycoside that is smilagenin attached to a O-beta-D-glucopyranosyl-(1->2)-[beta-D-glucopyranosyl-(1->3)]-beta-D-galactopyranosyl residue at position 3 via a glycosidic linkage. Isolated from Yucca gloriosa and Yucca guatemalensis, it exhibits antifungal activity.


yuccalan

A spirostanyl glycoside that is (3beta,5alpha,6alpha,25S)-spirostan-3,6,27-triol attached to a 6-O-beta-D-glucopyranosyl-beta-D-glucopyranosyl residue via a glycosidic linkage. Isolated from Yucca smalliana, it exhibits antifungal activity.


malic acid

A 2-hydroxydicarboxylic acid that is succinic acid in which one of the hydrogens attached to a carbon is replaced by a hydroxy group.


zaluzanin D

A sesquiterpene lactone that is decahydroazuleno[4,5-b]furan-2(3H)-one substituted by methylidene groups at positions 3, 6 and 9 and an acetlyoxy group at position 8. Isolated from Zaluzania triloba and Laurus nobilis, it exhibits trypanocidal activity.


zarzissine

A organonitrogen heterocyclic compound that is 1H-imidazo[4,5-d]pyridazine substituted by an amino group at position 2. A guanidine alkaloid isolated from Anchinoe paupertas, it exhibits cytotoxic activity against human and murine tumor cell lines.


zerumboneoxide

A sesquiterpenoid that is the 2, 3-epoxy derivative of zerumbone. Isolated from  Zingiber zerumbet, it exhibits inhibitory activity against nitric oxide synthase.


ZHANKUIC ACID A

A steroid acid that is ergosta-8,24(28)-dien-26-oic acid substituted by a methyl group at position 4 and oxo groups at positions 3, 7 and 11 (the 4alpha,5alpha stereoisomer). Isolated from  Antrodia cinnamomea and Antrodia camphorata, it exhibits cytotoxic and anti-inflammatory activity.


ZHANKUIC ACID B

A steroid acid that is ergosta-8,24(28)-dien-26-oic acid substituted by a hydroxy group at position 3, a methyl group at position 4 and oxo groups at positions 7 and 11 (the 3alpha,4alpha,5alpha stereoisomer). Isolated from Antrodia cinnamomea and Antrodia camphorata, it exhibits cytotoxic, anticholinergic and antiserotonergic activities.


ZHANKUIC ACID C

A steroid acid that is ergosta-8,24(28)-dien-26-oic acid substituted by hydroxy groups at positions 3 and 12, a methyl group at position 4 and oxo groups at positions 7 and 11 (the 3alpha,4alpha,5alpha,12alpha stereoisomer). Isolated from Antrodia cinnamomea and Antrodia camphorata, it exhibits antineoplastic activity.


zinolol

A monosaccharide derivative that is 1,4-dihydroxybenzene substituted by a (methylamino)methyl group at position 6 and a beta-D-glucopyranosyloxy residue at position 2. Isolated from Anagallis monelli, it exhibits antimutagenic and antioxidant activities.


sinularolide B

A cembrane diterpenoid isolated from Sinularia gibberosa and has been found to exhibit antineoplastic activity.


sinularolide C

A cembrane diterpenoid that is an epimer of sinularolide B at C-3. Isolated from Sinularia gibberosa and has been found to exhibit antineoplastic activity.


sinularolide D

A cembrane diterpenoid isolated from Sinularia gibberosa and has been shown to exhibit antineoplastic activity.


A steroid saponin that is beta-sitosterol substituted by a 3-O-hexacosanoyl-beta-D-glucopyranosyl residue at position 3 via a glycosidic linkage. Isolated from Acer okamotoanum, it exhibits anti-complement activity.


somocystinamide A

An organic disulfide that results from the dimerization of (10E,12R)-12-(acetylamino)-N-methyl-N-[(1E)-penta-1,4-dien-1-yl]-13-sulfanyltridec-10-enamide. Isolated from Lyngbya majuscula and Schizothrix, it exhibits antineoplastic acitivity.


SOPHORAFLAVANONE L

A trihydroxyflavanone that is flavanone substituted by hydroxy groups at positions 5, 2' and 4', a prenyl group at position 8 and a prenyloxy group at position 7. Isolated from the roots of Sophora flavescens, it exhibits cytotoxicity towards KB epidermoid carcinoma cell line.


SOROCENOL G

An organic heteropentacyclic compound isolated from Sorocea muriculata and has been shown to exhibit antibacterial activity against methicillin-resistant Staphylococcus aureus.


SOROCENOL H

A member of the class of 1-benzofurans isolated from Sorocea muriculata that has been shown to exhibit antibacterial activity against methicillin-resistant Staphylococcus aureus.


SOULATTROLIDE

A member of the class of coumarins that is 11,12-dihydro-2H,6H,10H-dipyrano[2,3-f:2',3'-h]chromen-2-one substituted by a phenyl group at position 4, methyl groups at positions 6, 6, 10 and 11 and a hydroxy group at position 12 (the 10S,11R,12S stereoisomer). Isolated from  Calophyllum brasiliense and Calophyllum soulattri, it exhibits anti-HIV activity.


A carboxylic ester obtained by the formal condensation of the secondary hydroxy group of 4-hydroxy-6-[hydroxy(phenyl)methyl]pyridin-2(1H)-one with 3-methylbutanoic acid. It is isolated from the culture broth of Penicillium sp. SPF-32629 and acts as an inhibitor of the enzyme chymase (EC 3.4.21.39).


A carboxylic ester obtained by the formal condensation of the benzylic hydroxy group of 4-hydroxy-6-[hydroxy(phenyl)methyl]-2-oxo-1,2-dihydropyridine-3-carboxylic acid with 3-methylbutanoic acid. It is isolated from the culture broth of Penicillium sp. SPF-32629 and acts as an inhibitor of the enzyme chymase (EC 3.4.21.39).


halisphingosine A

A sphingoid that is octadec-7-ene substituted by an amino group at position 2 and hydroxy groups at positions 1, 3 and 6 (the 2R,3R,6R,7Z stereoisomer). It is isolated from the marine sponge Haliclona.


spiculoic acid A

A carbobicyclic compound that is 2,3,3a,4,5,7a-hexahydro-1H-indene substituted by ethyl groups at positions 3, 4, 5 and 7, a methyl group at position 1, an oxo group at position 2, a 2-phenylethenyl group at position 5 and a carboxy group at position 4 (the 1R,3R,3aS,4S,5R,7aS stereoisomer). Isolated from Plakortis angulospiculatus, it exhibits cytotoxicity against human breast cancer MCF-7 cells.


stachsterol

A cholestanoid that is cholest-4-ene substituted by hydroxy groups at positions 20 and 25 and an oxo group at position 3. Isolated from Stachyurus himalaicus, it exhibits cytotoxic activity against human Hela cell lines.


stevastelin B

A 15-membered cyclodepsipeptide isolated from the culture broth of Penicillium sp. It exhibits significant immunosuppressive effect on T-cell activiation.


stevastelin B3

A 13-membered cyclodepsipeptide isolated from the culture broth of Penicillium sp. It exhibits significant immunosuppressive effect on T-cell activiation.


streptokordin

A pyridone that is pyridin-2(1H)-one substituted by an acetyl group at position 4 and a methyl group at position 6. It is isolated from the fermentation broth of Streptomyces sp. KORDI-3238 and exhibits moderate cytotoxicity against a number of human cancer cell lines.


streptoverticillin

A carbazole alkaloid that is 9H-carbazole substituted by a methyl group at position 2, methoxy groups at positions 3 and 4 and a (2S)-2-hydroxypropyl group at position 1. Isolated from mycelial solid culture of Streptoverticillium morookaense, it exhibits antifungal activity.


STRONGYLIN A

A sesquiterpenoid that is 1,2,3,4,4a,5,6,7,7a,8-decahydrobenzo[d]xanthene substituted by a hydroxy group at position 12, methyl groups at positions 4, 4, 7 and 7a and a methoxy group at position 9 (the 4aS,7S,7aR,13aS stereoisomer). Isolated from  Strongylophora hartmani, it exhibits activity against the influenza virus.


A diterpenoid that is 15,17-epoxypodocarpan-15-one substituted by a hydroxy group at position 13, methyl groups at positions 8 and 13 and a (5-methoxy-3,6-dioxocyclohexa-1,4-dien-1-yl)methyl group at position 14 (the 13alpha,14beta stereoisomer). Isolated from the marine sponge Petrosia corticata, it exhibits  antineoplastic activity.


STRYCHNOGUCINE A

A  bisindole alkaloid with a strychnine substructure isolated from the roots of Strychnos icaja and has been shown to exhibit antiplasmodial activity.


strychnogucine B

A bisindole alkaloid with a strychnine substructure isolated from the roots of Strychnos icaja and has been shown to exhibit antiplasmodial activity.


SUAVEOLINDOLE

A  terpenoid indole alkaloid that is 1H-indole substituted by cyclohexylmethyl ring at position 3 which in turn is substituted by additional methyl groups at positions 2 and 3, a propan-2-ylidene group at position 6 and a 2-carboxyethyl group at position 1. Isolated from   Greenwayodendron suaveolens, it exhibits antibacterial activity.


SUBEROSOL

A tetracyclic triterpenoid that is 24-methylidenelanosta-7,9(11)-diene substituted by hydroxy groups at positions 3 and 15 (3beta,15alpha stereoisomer). Isolated from Polyalthia suberosa, it exhibits anti-HIV activity.


(+)-subersic acid

A meroterpenoid that is 4,4,7,8a-tetramethyl-1,2,3,4,4a,5,6,8a-octahydronaphthalene substituted by a (3E)-5-(5-carboxy-2-hydroxyphenyl)-3-methylpent-3-en-1-yl moiety at position 8. It is isolated from the marine sponge Acanthodendrilla and exhibits inhibitory activity against the enzyme mitogen-activated protein kinase-activated protein kinase 2 (EC 2.7.11.1).


subulatin

An alkyl caffeate ester isolated from Lophocolea heterophylla and Jungermannia subulata and has been shown to exhibit antioxidant activity.


surugapyrrole A

A pyrrolecarboxamide obtained by the formal condensation of 1-hydroxy-4-methyl-1H-pyrrole-2-carboxylic acid with the amino group of 3-aminopropanoic acid. It is isolated from the culture broth of Streptomyces sp.USF-6280 and exhibits DPPH radical scavenging activity.


surugapyrrole B

A pyrrolecarboxamide obtained by the formal condensation of 1-hydroxy-1H-pyrrole-2-carboxylic acid with the amino group of 3-aminopropanoic acid. It is isolated from the culture broth of Streptomyces sp.USF-6280 and exhibits DPPH radical scavenging activity.


SWERTIFRANCHESIDE

A ring assembly that is a dimer obtained by coupling between 1,5,8-trihydroxy-3-methoxy-9H-xanthen-9-one and C-glycosylated 5,7,3',4'-tetrahydroxyflavone. Isolated from Swertia franchetiana, it exhibits anti-HIV activity.


SWERTIPUNICOSIDE

A C-glycosyl compound that is the 2'-C-beta-D-glucopyranosyl derivative of 1,5,8-trihydroxy-3-methoxy-7-(1',3',6',7'-tetrahydroxy-9'-oxo-4'-xanthyl)xanthone; isolated from Swertia punicea.


SYNCARPAMIDE

An  alkaloid that is the di-O-cinnamoyl derivative of 3,4-di-O-methylnorepinephrine. Isolated from  Zanthoxylum syncarpum, it exhibits antiplasmodial activity.


laccaridione A

An organic heterotricyclic compound that is 1H-benzo[g]isochromene-8,9-dione substituted by a hydroxy group at position 10, methoxy groups at positions 1 and 7 and a 4-methylhex-2-en-2-yl group at position 3. Isolated from the stem of the fruiting bodies of the basidiomycete strain Laccaria amethystea, it exhibits inhibitory activity against proteases.


laccaridione B

An organic heterotricyclic compound that is 1H-benzo[g]isochromene-8,9-dione substituted by an ethoxy group at position 1, hydroxy group at position 10, a methoxy group at position 7 and a 4-methylhex-2-en-2-yl group at position 3. Isolated from the stem of the fruiting bodies of the basidiomycete strain Laccaria amethystea, it exhibits inhibitory activity against proteases.


lancifodilactone F

A tetracyclic triterpenoid that is a rearranged pentanortriterpenoid derived from cycloartane. Isolated from the leaves and stem of Schisandra lancifolia, it exhibits anti-HIV activity.


lancifodilactone G

A triterpenoid that is a nortriterpenoid isolated from Schisandra lancifolia and has been shown to exhibit anti-HIV activity.


LANCILACTONE C

A terpene lactone isolated from the stems and roots of Kadsura lancilimba and has been shown to exhibit anti-HIV activity.


lansioside A

A triterpene glycoside isolated from the fruit peels of Lansium domesticum and has been shown to exhibit inhibitory activity against leukotriene.


largamide D

A 19-membered cyclodepsipeptide isolated from the marine cyanobacterium Oscillatoria sp. It exhibits significant inhibitory activity against the enzyme chymotrypsin (EC 3.4.21.1).


lanigerol

A diterpenoid of icetexane type isolated from roots of Salvia lanigera and has been shown to exhibit antibacterial activity.


lactonamycin

An organic heterohexacyclic compound isolated from the culture broth of Streptomyces rishiriensis. It is an antibiotic with antibacterial activity.


LAUREBIPHENYL

A sesquiterpenoid that is a dimer of a cyclolaurane type sesquiterpene. Isolated from the marine red algae Laurencia nidifica and Laurencia tristicha, it exhibits antineoplastic activity.


laurinterol

A sesquiterpenoid isolated from Laurencia intermedia and Aplysia kurodai and has been found to exhibit antibacterial activity,


debromolaurinterol

A sesquiterpenoid that is laurinterol in which the bromo group has been replaced by a hydrogen. Isolated from Laurencia intermedia and Aplysia kurodai, it exhibits antimicrobial activity.


NORBOLDINE

An aporphine alkaloid that is noraporphine substituted by hydroxy groups at positions 2 and 9 and methoxy groups at positions 1 and 10. Isolated from Litsea glutinosa and Lindera chunii, exhibits inhibitory activity against HIV-1 integrase.


A tetrahydroxyflavone that is kaempferol substituted by a lavandulyl group at position 8. Isolated from Sophora flavescens, it exhibits antioxidant activity.


LEACHIANONE A

A trihydroxyflavanone that is (2S)-flavanone substituted by a lavandulyl group at position 8, hydroxy groups at positions 5, 7 and 4' and a methoxy group at position 2'. Isolated from the roots of Sophora flavescens and Sophora leachiana, it exhibits antineoplastic and antimalarial activity.


LESPEFLORIN A3

A monohydroxyflavanone that is flavanone substituted with a hydroxy group at position 7, prenyl groups at positions 6 and 8 and a 6,6-dimethyl-3,6-dihydro-2H-pyran ring fused across positions 3' and 4'. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN B2

A trihydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 3, 7 and 4' and prenyl groups at positions 6 and 8. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN B3

A trihydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 3, 7 and 4' and prenyl groups at positions 6, 8 and 3'. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN B4

A trihydroxyflavanone that is (2S)-flavanone substituted by hydroxy groups at positions 3, 5, 7 and 4' and prenyl groups at positions 6, 8 and 3'. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN C3

A member of the class of dihydrochalcones that is alpha-hydroxydihydrochalcone substituted by hydroxy groups at positions 4 and 4', a methoxy group at position 2' and a prenyl group at position 5'. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN G2

A member of the class of pterocarpans that is (6aR,11aR)-pterocarpan substituted by hydroxy groups at positions 3 and 8, a methoxy group at position 9 and prenyl groups at positions 2 and 10. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN G3

A member of the class of pterocarpans that is (6aR,11aR)-pterocarpan substituted by hydroxy groups at positions 3 and 8, methoxy groups at positions 1 and 9 and prenyl groups at positions 2 and 10. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN G5

A member of the class of pterocarpans that is (6aR,11aR)-pterocarpan substituted by hydroxy groups at positions 3 and 9, a methyl group at position 8 and prenyl groups at positions 4 and 10. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN G8

A member of the class of pterocarpans that is (6aR,11aR)-pterocarpan substituted by a hydroxy group at position 8, methoxy groups at positions 3 and 9 and a prenyl group at position 10. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN G10

A member of the class of pterocarpans that is (6aR,11aR)-pterocarpan substituted by hydroxy groups at positions 3 and 9, a methyl group at position 8 and a prenyl group at position 10. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


LESPEFLORIN H2

A member of the class of coumestans that is 9,10-dihydro-6H-[1]benzofuro[3,2-c]chromene substituted by a methoxy group at position 3, a hydroxy group at position 8 and a 6,6-dimethyl-3,6-dihydro-2H-pyran ring fused across positions 9 and 10. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


leucisterol

A member of the class of phytosterols that is stigmasta-5,22-diene substituted by hydroxy groups at positions 3 and 20 (the 3beta,22E stereoisomer). Isolated from the whole plants of Leucas urticifolia, it exhibits cholinesterase inhibitory activity.


leucosesterterpenone

A sesterterpenoid isolated from Leucosceptrum canum. It has been shown to exhibit anti-angiogenic and inhibitory activity against prolyl endopeptidase ( EC 3.4.21.26 ).


leucosesterlactone

A natural product found in Leucosceptrum canum.


leucospiroside A

A spirostanyl glycoside that is agigenin attached to a pentasaccharide unit via a glycosidic linkage. Isolated from the flowers of Allium leucanthum, it exhibits antineoplastic activity.


leufolin A

A flavanone glycoside that is (S)-naringenin attached to a  6-O-[(2E)-3-(4-hydroxyphenyl)prop-2-enoyl]-beta-D-glucopyranosyl moiety at position 4' via a glycosidic linkage. Isolated from Leucas urticifolia, it acts as a cholinesterase inhibitor.


leufolin B

A flavanone glycoside that is 6,8,4'-trihydroxyflavanone attached to a 6-O-[(2E)-3-(4-hydroxyphenyl)prop-2-enoyl]-beta-D-glucopyranosyl moiety at position 4' via a glycosidic linkage. Isolated from Leucas urticifolia, it acts as a cholinesterase inhibitor.


lindechunine A

An isoquinoline alkaloid that is 4,5,6,6a-tetradehydronoraporphin-7-one substituted by a methylenedioxy group across positions 1 and 2, methoxy groups at positions 3 and 11 and a hydroxy group at position 10. Isolated from the roots of Lindera chunii, it exhibits anti-HIV activity.


liphagal

A meroterpenoid isolated from the marine sponge Aka coralliphaga and has been shown to exhibit inhibitory activity against phosphatidylinositol-3-OH kinase.


LISSOCLIBADIN 1

An  organosulfur heterocyclic compound isolated from the ascidian Lissoclinum badium. It has been shown to exhibit cytotoxicity against human cancer cell lines.


LISSOCLIBADIN 2

An organosulfur heterocyclic compound isolated from the ascidian Lissoclinum badium. It has been shown to exhibit cytotoxicity against human cancer cell lines.


LISSOCLIBADIN 3

A member of the class of  thianthrenes that is thianthrene substituted by methoxy groups at positions 3, 4, 8 and 9, methylsulfanyl groups at positions 2 and 7 and 2-(dimethylamino)ethyl groups at positions 1 and 6. Isolated from the ascidian Lissoclinum badium, it exhibits cytotoxicity against human cancer cells.


LITSEAEFOLOSIDE C

An O-acyl carbohydrate consisting of glucose attached to 2-hydroxy-4-vanilloyloxymethylphenyl and trans-caffeoyl group at positions 1 and 6 respectively. Isolated from stems of Ilex latifolia, it exhibits inhibitory activity against alpha-glucosidase and lipase.


littorachalcone

A member of the class of dihydrochalcones isolated from the aerial parts of Verbena litoralis and exhibits stimulating the effect of nerve growth factor (NGF).


LOBOHEDLEOLIDE

A cembrane diterpenoid isolated from Lobophytum hedleyi and Lobophytum. It exhibits anti-HIV-1 activity.


A cembrane diterpenoid isolated from Lobophytum and shown to have anti-HIV-1 activity.


locoracemoside B

An O-acyl carbohydrate consisting of 6-O-beta-D-glucopyranuronosyl-beta-D-glucopyranose attached to a 4-methoxybenzyl and a benzoyl group at positions 1 and 3 respectively. Isolated from Symplocos racemosa, it exhibits inhibitory activity against chymotrypsin.


locoracemoside C

An O-acyl carbohydrate consisting of 6-O-beta-D-glucopyranosyl-beta-D-glucopyranose attached to a 3,4,5-trimethoxybenzyl and a galloyl group at positions 1 and 3 respectively. Isolated from Symplocos racemosa, it exhibits inhibitory activity against chymotrypsin.


longicalycinin A

A homodetic cyclic peptide composed of glycyl, L-phenylalanyl, L-tyrosyl, L-prolyl and L-phenylalanyl residues joined sequentially to give a 15-membered macrocycle. Isolated from Dianthus superbus var longicalycinus, it exhibits anti-cancer activity.


1-DEMETHYLKADSUPHILIN A

A lignan isolated from the roots and stems of Kadsura longipedunculata and has been shown to exhibit inhibitory activity against HIV-1 protease.


LUCENSIMYCIN E

An organic heterotetracyclic compound isolated from the bacterial strain Streptomyces lucensis MA7349 and has been shown to exhibit antibacterial activity.


LUCIALDEHYDE B

A tetracyclic triterpenoid that is  lanosta-8,24-dien-26-al substituted by oxo groups at positions 3 and 7. Isolated from Ganoderma lucidum and Ganoderma pfeifferi, it exhibits antiviral and cytotoxic activities.


lucialdehyde C

A tetracyclic triterpenoid that is lanosta-8,24-dien-26-al substituted by a beta-hydroxy group at position 3 and an oxo group at position 7. Isolated from Ganoderma lucidum and Ganoderma pfeifferi, it exhibits cytotoxic activity.


LUCIDENIC ACID N

A  tetracyclic triterpenoid that is 25,26,27-trinorlanost-8-en-24-oic acid substituted by hydroxy groups at positions 3 and 7 and oxo groups at positions 11 and 15 respectively (the 3beta,5alpha,7beta stereoisomer). Isolated from the fruiting bodies of Ganoderma lucidum, it exhibits cytotoxicity against tumour cells.


lucidumoside C

A secoiridoid glycoside isolated from Ligustrum lucidum which has been shown to exhibit antioxidant activity against hemolysis of red blood cells induced by free radicals.


lupulin A

A  diterpenoid isolated from Ajuga lupulina and has been shown to exhibit anti-inflammatory and antibacterial activities.


luzonial A

An iridoid monoterpenoid that is hexahydro-1H-cyclopenta[c]furan substituted by hydroxy groups at positions 1 and 3a, a 3-oxopropen-2yl group at position 6 and a trans-4-coumaroyloxy moiety at position 4 (the 1S,3aS,4S,6S,6aS stereoisomer). Isolated from the leaves of Viburnum luzonicum, it exhibits antineoplastic activity.


luzonial B

An iridoid monoterpenoid that is hexahydro-1H-cyclopenta[c]furan substituted by hydroxy groups at positions 1 and 3a, a 3-oxopropen-2yl group at position 6 and a cis-4-coumaroyloxy moiety at position 4 (the 1S,3aS,4S,6S,6aS stereoisomer). Isolated from the leaves of Viburnum luzonicum, it exhibits antineoplastic activity.


luzonidial B

An iridoid monoterpenoid that is cyclopentene substituted by a formyl group at position 3, a hydroxymethyl group at position 2, 3-oxopropen-2yl group at position 4 and a cis-4-coumaroyloxy moiety at position 1 (the 1S,4R stereoisomer). Isolated from the leaves of Viburnum luzonicum, it exhibits antineoplastic activity.


LYCHNOSTATIN 1

A germacranolide isolated from Lychnophora antillana and has been shown to exhibit antineoplastic activity.


lycojapodine A

An alkaloid isolated from the club moss Lycopodium japonicum and has been shown to exhibit acetylcholinesterase inhibitory and anti-HIV-1 activity.


lycoperine A

An alkaloid that consists of piperidine substituted by [1-acetyl-7-methyl-1,2,3,4,6,7,8,8a-octahydroquinolin-5-yl]methyl moieties at positions 2 and 6 respectively. Isolated from Lycopodium hamiltonii, it exhibits acetylcholinesterase inhibitory activity.


A lignan that consists of (+)-lyoniresinol attached to two beta-D-glucopyranosyl units at positions 4 and 4' via glycosidic linkages. Isolated from Indigofera heterantha, it exhibits inhibitory activity against lipoxygenase.


A lignan that is (+)-lyoniresinol substituted by a beta-D-glucopyranosyl moiety at position 3 via a glycosidic linkage. Isolated from the root barks of Stemmadenia minima and Lycium chinense, it exhibits antimicrobial activities.


lyratol C

An sesquiterpenoid that is decahydronaphthalene substituted by hydroxy groups at positions 1 and 2, a methyl group at position 8a, a methylidene group at position 4 and a 1,2-dihydroxypropan-2-yl at position 6 (the 1R,2R,4aR,6S,8aS stereoisomer) . Isolated from Solanum lyratum, it exhibits cytotoxicity against human cancer cell lines.


lyratol D

A sesquiterpene lactone that is butan-4-olide substituted by geminal methyl groups at position 5 and a 4-hydroxy-2,6-dimethylbenzyl group at position 4. Isolated from Solanum lyratum, it exhibits cytotoxicity against human cancer cell lines.


LESPEFLORIN D1

A hydroxyisoflavanone that is isoflavanone substituted by hydroxy groups at positions 7 and 4', a methoxy group at position 2' and prenyl groups at positions 8 and 3'. Isolated from the roots of Lespedeza floribunda, it acts as a melanin synthesis inhibitor.


NALANTHALIDE

A pyranone diterpenoid isolated from Nalanthamala and Chaunopycnis alba and has been shown to be a blocker of the voltage-gated potassium channel Kv1.3


nardoperoxide

A sesquiterpenoid that is 1,4,5,6,7,8-hexahydro-4,7-epidioxyazulen-3(2H)-one substituted by a hydroxy group at position 8, methyl groups at positions 1 and 4 and an isopropyl group at position 7 (the (1R,4R,7R,8R stereoisomer). Isolated from Nardostachys chinensis, it exhibits antimalarial activity.


isonordoperoxide

A sesquiterpenoid that is 1,4,5,6,7,8-hexahydro-4,7-epidioxyazulen-3(2H)-one substituted by a hydroxy group at position 8, methyl groups at positions 1 and 4 and an isopropyl group at position 7 (the (1R,4R,7S,8S stereoisomer). Isolated from Nardostachys chinensis, it exhibits antimalarial activity.


negundin B

A lignan that consists of 7,8-dihydronaphthalen-2-ol substituted by a 4-hydroxy-3-methoxyphenyl group at position 8, hydroxymethyl groups at positions 6 and 7 and a methoxy group at position 3 (the 7R,8S stereoisomer). Isolated from Vitex negundo, it exhibits inhibitory activity against lipoxygenase.


NEOBAVAISOFLAVONE

A member of the class of 7-hydroxyisoflavones that is 7-hydroxyisoflavone with an additonal hydroxy group at position 4' and a prenyl group at position 3'. Isolated from seeds of Psoralea corylifolia, it exhibits inhibitory activity against DNA polymerase and platelet aggregation.


NEOPYRROLOMYCIN B

A member of the class of trichlorophenols that is 3,4,5-trichlorophenol substituted by a 2,3,4-trichloro-1H-pyrrolyl moiety at position 2. It is isolated from the fermentation broth of Streptomyces and exbits broad-spectrum antibacterial activity against a panel of pathogens including variety of drug-susceptible and drug-resistant phenotypes.


nepalensinol D

A stilbenoid isolated from the stems of  Kobresia nepalensis and has been shown to exhibit inhibitory activity against topoisomerase II.


nepalensinol E

A stilbenoid isolated from the stems of Kobresia nepalensis and has been shown to exhibit inhibitory activity against topoisomerase II.


nerolidol glycoside

A tetrasaccharide derivative of nerolidol isolated from Eriobotrya japonica, and has been shown to exhibit hypoglycemic activity.


neurolenin A

A germacranolide isolated from Neurolaena lobata and Austroeupatorium inulifolium and has been shown to exhibit antimalarial activity.


A quinone imine that is 1,4-benzoquinone imine substituted by a methoxy group at position 3 and a (phenylacetyl)nitrilo group attached to the nitrogen atom. Isolated from the fermentation broth of Penicillium minioluteum, it exhibits neurotrophic effect of NGF.


nidulalin A

A member of the class xanthones which consists of a dihydroxanthone skeleton substituted by hydroxy groups at positions 4 and 8, a methyl group at position 6 and a methoxycarbonyl group at position 4a (the 4R,4aS stereoisomer). It is isolated from Emericella nidulans var lata and Penicillium and exhibits potent antitumour activity against both human and murine tumour cell lines.


NIGRANOIC ACID

A tetracyclic triterpenoid that is 3,4-secocycloarta-4(28),24-(Z)-diene substituted by carboxy groups at positions 3 and 26. Isolated from Schisandra henryi and Schisandra propinqua, it exhibits cytotoxic and anti-HIV activities.


niruriside

An O-acyl carbohydrate that consists of beta-D-fructofuranosyl beta-D-glucopyranoside in which the hydroxy protons are replaced by acetyl and trans-cinnamoyl groups. Isolated from Phyllanthus niruri, it exhibits anti-HIV activity.


NITENSIDINE E

An alkaloid that is 1,4,5,6-tetrahydropyrimidine substituted by an amino group at position 2 and by a methyl group and a 4-methylpenta-1,3-dien-1-yl group at position 6. Isolated from the leaves of Pterogyne nitens, it exhibits cytotoxicity against a panel of human cancer cell lines.


A 24-membered macrolide antibiotic isolated from the fermentation broth of Streptomyces sp.NK154183. It exhibits antifungal and antitumour activity against the human colon adenocarcinoma.


A dinitrile that is butanedinitrile substituted by  4-methoxybenzyl and  4-methoxybenzylidene groups at positions 2 and 3 respectively. Isolated from the culture broth of the fungus Neosartorya fischeri, it exhibits antifungal activity.


A dinitrile that is butanedinitrile substituted by 4-methoxybenzyl and  3,4-dimethoxybenzylidene groups at positions 3 and 2 respectively. Isolated from the culture broth of the fungus Neosartorya fischeri, it exhibits antifungal activity.


A dinitrile that is butanedinitrile substituted by  3-hydroxy-4-methoxybenzylidene and 4-methoxybenzyl groups at positions 2 and 3 respectively. Isolated from the culture broth of the fungus Neosartorya fischeri, it exhibits antifungal activity.


nocardione A

A naphthofuran that is 2,3-dihydronaphtho[1,2-b]furan-4,5-dione substitutd by a hydroxy group at position 6 and a methyl group at position 2. It is isolated from Norcardia sp.TC-A0248 and acts as a protein tyrosine phosphatase inhibitor.


14-NORPSEUROTIN A

An alkaloid that is the 14-nor derivative of pseurotin A. Isolated from Aspergillus sydowii, it exhibits antibacterial, antileishmanial and anticancer activities.


nostocarboline

A member of the class of beta-carbolines that is 9H-beta-carbolin-2-ium substituted by a chloro group at position 6 and a methyl group at position 2. It is isolated from a fresh water cyanobacterium Nostoc 78-12A and acts as an inhibitor of butyrylcholinesterase.


nothramicin

An anthracycline antibiotic isolated from the culture broth of Nocardia sp. MJ896-43F17. It exhibits significant antimycobacterial activity against several drug-resistant Mycobacterium smegmatis strains.


A member of the class of benzamides that is benzamide substituted by an acetylamino group at position 2. It is an antibiotic isolated from Streptomyces aurantiogriseus and has been shown to exhibit antifungal activity.


malonylapiin

A glycosyloxyflavone that is the 6''-malanoate ester of apiin.