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