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