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