Methyl 2-cyano-3-nitro-5-(trifluoromethoxy)pyridine-4-carboxylate
4-Cyano-3-nitro-5-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Cyano-5-nitro-4-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Cyano-4-nitro-5-(trifluoromethoxy)pyridine-2-carboxylic acid