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