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