Methyl 3-bromo-6-hydroxy-2-(trifluoromethoxy)pyridine-5-acetate
Methyl 4-bromo-6-hydroxy-3-(trifluoromethoxy)pyridine-2-acetate
Methyl 4-bromo-2-hydroxy-3-(trifluoromethoxy)pyridine-6-acetate
Methyl 5-bromo-3-hydroxy-2-(trifluoromethoxy)pyridine-4-acetate