Dehydrowarfarin is a metabolite of (±)-warfarin .1It is formed from (±)-warfarin by rat liver microsomes. 1.Kaminsky, L.S., Fasco, M.J., and Guengerich, F.P.Comparison of different forms of liver, kidney, and lung microsomal cytochrome P-450 by immunological inhibition of regio- and stereoselective metabolism of warfarinJ. Biol. Chem.254(19)9657-9662(1979)