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