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