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