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