6-Cyano-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxylic acid
2-Cyano-4-nitro-3-(trifluoromethoxy)pyridine-5-carboxylic acid
2-Cyano-3-nitro-5-(trifluoromethoxy)pyridine-6-carboxylic acid
4-Cyano-6-nitro-3-(trifluoromethoxy)pyridine-2-carboxaldehyde