3-Cyano-5-fluoro-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
5-Cyano-4-fluoro-2-(trifluoromethoxy)pyridine-3-carboxaldehyde
3-Cyano-2-fluoro-6-(trifluoromethoxy)pyridine-5-carboxaldehyde
6-Cyano-4-fluoro-2-(trifluoromethoxy)pyridine-3-carboxaldehyde