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