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