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