3-Cyanobenzoic Acid Methyl Ester, is an intermediate for the synthesis of 3-Carbamoylbenzoic Acid Derivatives as Inhibitors of Human Apurinic/Apyrimidinic Endonuclease 1 (APE1). It can also be used for the preparation of 3-[5-(2-Fluorophenyl)-1,2,4-oxadiazol-3-yl]benzoic Acid Sodium Salt (F596070).