Leflunomide EP Impurity - C

5-Methyl-N-[3-(trifluoromethyl)-phenyl]isoxazole-4-carboxamide; 5-Methyl-N-[3-(trifluoromethyl)phenyl]-4-isoxazolecarboxamide; (N-(3'-Trifluoromethylphenyl)-5-methylisoxazole-4-carboxamide); Leflunomide Related Compound C (USP);