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