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