organic anion (S)-warfarin (R)-warfarin(1-) (S)-warfarin(1-) chebi_ontology 2-oxo-3-[(1S)-3-oxo-1-phenylbutyl]-2H-1-benzopyran-4-olate 307.09758 PJVWKTKQMONHTI-HNNXBMFYSA-M -1 C19H15O4 C1=CC=CC2=C1C(=C(C(O2)=O)[C@@H](CC(C)=O)C3=CC=CC=C3)[O-] CHEBI:87744 (S)-warfarin An organic anion that is the conjugate base of (S)-warfarin, obtained by deprotonation of the hydroxy group. 307.321 InChI=1S/C19H16O4/c1-12(20)11-15(13-7-3-2-4-8-13)17-18(21)14-9-5-6-10-16(14)23-19(17)22/h2-10,15,21H,11H2,1H3/p-1/t15-/m0/s1