19841-48-6 3650-73-5 Histidine, N-(4-aminobutyryl)-, L- (8CI) Homocarnosine L-Histidine, N-(4-amino-1-oxobutyl)- (9CI) L-Homocarnosine N-(4-Aminobutyryl)-L-histidine NSC 92522 gamma-Aminobutyryl-L-histidine gamma-Aminobutyrylhistidine