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