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