Nifedipine impurity A - Dimethyl 2,6-dimethyl-4-(2-nitrophenyl) pyridine-3,5-dicarboxylate

Nifedipine impurity B - Dimethyl 2,6-dimethyl-4-(2-nitrosophenyl) pyridine-3,5-dicarboxylate

Niflumic acid

Niflumic acid impurity A - 2-chloropyridine-3-carboxylic acid

Niflumic acid impurity B - 2-hydroxy-N-(3-(trifluoromethyl)phenyl)pyridine-3-carboxamide

Niflumic acid impurity E - 6-((3-(trifluoromethyl)phenyl)amino)pyridine-3-carboxylic acid

Nifuroxazide

Nikethamide

Nilutamide

Nilutamide impurity B - 4-nitro-3-(trifluoromethyl)aniline