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