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