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