Methyl 3-amino-2-(difluoromethyl)-4-nitropyridine-6-carboxylate
4-(Difluoromethyl)-2-nitro-5-(trifluoromethyl)pyridine-3-sulfonyl chloride
4-Amino-3-(difluoromethyl)-5-(trifluoromethyl)pyridine-2-acetic acid
4-(Difluoromethyl)-2-(trifluoromethyl)pyridine-3-sulfonamide