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