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