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