331-38-4 501-11-1 Balenine L-Histidine, N-beta-alanyl-1-methyl- N(beta)-Alanyl-1-methyl-histidine N-beta-Ala-1-methyl-his Nbeta-Alanyl-1-methyl-L-histidine Nbeta-Alanyl-1-methyl-histidine