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