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