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