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