Leflunomide is a medication of the DMARD type, used in active moderate to severe rheumatoid arthritis and psoriatic arthritis. Chemical Name 5-methyl-N-[4-(trifluoromethyl) phenyl]-isoxazole-4-carboxamideCAS Number 75706-12-6Molecular Formula C12H9F3N2O2Molecular Weight 270.21 ItemsSpecificationAppearance White or almost white crystalline powderIdentificationMeets the requirementMelting Point164. ...