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