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