6-Chloro-3-fluoro-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
4-Chloro-3-cyano-5-fluoro-2-(trifluoromethoxy)pyridine
2-Bromo-3-(chloromethyl)-4-(trifluoromethoxy)pyridine-5-carboxaldehyde
2-Chloro-5-fluoro-3-(trifluoromethoxy)pyridine-4-carboxaldehyde