6-Cyano-3-fluoro-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
2-Cyano-4-fluoro-6-(trifluoromethoxy)pyridine-3-carboxaldehyde
2-Cyano-4-fluoro-3-(trifluoromethoxy)pyridine-6-carboxaldehyde
3-Cyano-4-iodo-2-(trifluoromethoxy)pyridine-6-carboxylic acid