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