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