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