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