CAS: 81-81-2 Molecular Formula: C19 H16 O4 Molecular Weight (g/mol): 308.33 Synonym: 2H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenylbutyl)-,Coumarin, 3-(α-acetonylbenzyl)-4-hydroxy- (7CI,8CI),4-Hydroxy-3-(3-oxo-1-phenylbutyl)-2H-1-benzopyran-2-one,(RS)-Warfarin,(±)-Warfarin,(±)-Warfarin-alcohol,1-(4'-Hydroxy-3'-coumarinyl)-1-phenyl-3-butanone,3-(1'-Phenyl-2'-acetylethyl)-4-hydroxycoumarin,3-(α-Acetonylbenzyl)-4-hydroxycoumarin,3-(α-Phenyl-β-acetylethyl)-4-hydroxycoumarin,4-Hydroxy-3-(3-oxo-1-phenylbutyl)-2H-chromen-2-one,Athrombine-K,Brumolin,Circuvit,Co-Rax,Compound 42,Coumafen,Coumafene,Coumaphen,Coumefene,DL-3-(α-Acetonylbenzyl)-4-hydroxycoumarin,Dethmor,Kumader,Kumadu,Kumatox,Martefarin,NSC 59813,Ratron,Ratron G,Rodafarin,Rodafarin C,Rodex,Temus W,Vampirinip II,Vampirinip III,W.A.R.F. 42,WARF compound 42,Warf 5,Warfarin,Warfarin acid,Zoocoumarin,rac-Warfarin IUPAC Name: 4-hydroxy-3-(3-oxo-1-phenylbutyl)chromen-2-one SMILES: CC(=O)CC(C1=C(O)c2ccccc2OC1=O)c3ccccc3