The chemical (R)-Warfarin has a designated molecular formula of C19H16O4 and a molecular weight of 308.333 g/mol. Synonyms may include: Dextrowarfarin, EINECS 226-908-9, (R)-4-Hydroxy-3-(3-oxo-1-phenylbutyl)-2H-1-benzopyran-2-one, UNII-09CC5J5C8A (ChemID).