5-Cyano-2-(difluoromethyl)-3-nitropyridine-4-acetic acid
Methyl 4-(bromomethyl)-5-cyano-2-(difluoromethyl)pyridine-3-carboxylate
4-Cyano-2-(difluoromethyl)-3-nitropyridine-5-sulfonyl chloride
6-Cyano-3-(difluoromethyl)-2-(trifluoromethyl)pyridine-4-acetic acid