3-Chloro-5-hydroxy-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
3-Bromo-2-(fluoromethyl)-4-(trifluoromethoxy)pyridine-5-carboxaldehyde
5-Chloro-4-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxaldehyde
3-Chloro-2-hydroxy-6-(trifluoromethoxy)pyridine-5-carboxaldehyde