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