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