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