1.0 2026-09-21 17:54:57 UTC 2026-09-21 17:55:22 UTC FDB116848 camptothecin (19S)-19-ethyl-19-hydroxy-17-oxa-3,13-diazapentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21),2,4,6,8,10,15(20)-heptaene-14,18-dione C20H16N2O4 InChI=1S/C20H16N2O4/c1-2-20(25)14-8-16-17-12(7-11-5-3-4-6-15(11)21-17)9-22(16)18(23)13(14)10-26-19(20)24/h3-8,25H,2,9-10H2,1H3/t20-/m0/s1 VSJKWCGYPAHWDS-FQEVSTJZSA-N belongs to the class of organic compounds known as camptothecins. These are heterocyclic compounds comprising a planar pentacyclic ring structure, that includes a pyrrolo[3,4-beta]-quinoline moiety (rings A, B and C), conjugated pyridone moiety (ring D) and one chiral center at position 20 within the alpha-hydroxy lactone ring with (S) configuration (the E-ring). Camptothecins Organic compounds Alkaloids and derivatives Camptothecins Aromatic heteropolycyclic compounds Azacyclic compounds Benzenoids Carbonyl compounds Carboxylic acid esters Heteroaromatic compounds Hydrocarbon derivatives Lactams Lactones Monocarboxylic acids and derivatives Organic oxides Organonitrogen compounds Organopnictogen compounds Oxacyclic compounds Pyranopyridines Pyridinones Quinolines and derivatives Tertiary alcohols Alcohol Aromatic heteropolycyclic compound Azacycle Benzenoid Camptothecin Carbonyl group Carboxylic acid derivative Carboxylic acid ester Heteroaromatic compound Hydrocarbon derivative Lactam Lactone Monocarboxylic acid or derivatives Organic nitrogen compound Organic oxide Organic oxygen compound Organoheterocyclic compound Organonitrogen compound Organooxygen compound Organopnictogen compound Oxacycle Pyranopyridine Pyridine Pyridinone Quinoline Tertiary alcohol formula C20H16N2O4 ChemAxon inchi InChI=1S/C20H16N2O4/c1-2-20(25)14-8-16-17-12(7-11-5-3-4-6-15(11)21-17)9-22(16)18(23)13(14)10-26-19(20)24/h3-8,25H,2,9-10H2,1H3/t20-/m0/s1 ChemAxon inchikey VSJKWCGYPAHWDS-FQEVSTJZSA-N ChemAxon