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