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