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