2-Chloro-5-cyano-4-(difluoromethyl)pyridine-3-carboxylic acid
4-Chloro-3-(difluoromethyl)-6-nitropyridine-2-sulfonyl chloride
6-Chloro-4-cyano-2-(difluoromethyl)pyridine-3-carboxylic acid
4-Chloro-2-(difluoromethyl)-3-nitropyridine-6-sulfonyl chloride