4-(((Phenylmethoxy)carbonyl)amino)butanoic acid 4-(Carboxyamino)butyric acid N-benzyl ester 4-06-00-02342 (Beilstein Handbook Reference) 5105-78-2 BRN 1884426 BUTYRIC ACID, 4-(CARBOXYAMINO)-, N-BENZYL ESTER Butanoic acid, 4-(((phenylmethoxy)carbonyl)amino)- (9CI) Carbobenzoxy-4-aminobutyric acid N-Carbobenzoxy-gamma-aminobutyric acid N-Cbz-gaba NSC 120007