Ethyl 5-(chloromethyl)-2-cyano-4-(trifluoromethoxy)pyridine-3-acetate
Methyl 4-(bromomethyl)-3-cyano-2-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 4-(chloromethyl)-5-cyano-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 5-(bromomethyl)-3-cyano-4-(trifluoromethoxy)pyridine-2-carboxylate