4-Cyano-5-nitro-2-(trifluoromethoxy)pyridine-3-carboxaldehyde
4-Cyano-3-fluoro-6-methoxy-2-(trifluoromethoxy)pyridine
4-(Aminomethyl)-5-chloro-3-(trifluoromethoxy)pyridine-2-carboxaldehyde
4-Cyano-3-nitro-5-(trifluoromethoxy)pyridine-2-carboxaldehyde