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