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