2-(Difluoromethyl)-6-methoxy-4-nitropyridine-3-carbonyl chloride
2-(Difluoromethyl)-5-methoxy-6-nitropyridine-3-carbonyl chloride
2-(Difluoromethyl)-5-methoxy-4-nitropyridine-3-carbonyl chloride
2-(Difluoromethyl)-3-methoxy-6-nitropyridine-5-carbonyl chloride