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