108605-62-5 2-Butenamide, 2-cyano-3-hydroxy-N-(4-(trifluoromethyl)phenyl)- 2-Cyano-3-hydroxy-N-(4-(trifluoromethyl)phenyl)-2-butenamide A 771726 A77 1726 A771726 Active metabolite of leflunomide N-(4-Trifluoromethylphenyl)-2-cyano-2-hydroxycrotonamide