LeflunoMide EP IMpurity G;Leflunomide Impurity III;Leflunomide Impurity 7(Leflunomide EP Impurity G);Leflunomide Impurity 2;5-methyl-N-(4-methylphenyl)-1,2-oxazole-4-carboxamide;5-methyl-N-(p-tolyl)isoxazole-4-carboxamide;Imp. G (EP):5-Methyl-N-(4-methylphenyl)-isoxazole-4-carboxamide;5-Methyl-N-(4-methylphenyl)isoxazol