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