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