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