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