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