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