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