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