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