3-(Difluoromethyl)-2-hydroxy-6-iodopyridine-4-sulfonyl chloride
4-(Difluoromethyl)-5-fluoro-2-methylpyridine-3-sulfonyl chloride
3-(Difluoromethyl)-2-hydroxy-5-iodopyridine-4-sulfonyl chloride
4-(Difluoromethyl)-5-fluoro-3-methylpyridine-2-sulfonyl chloride