N(alpha),N(alpha),N(alpha)-trimethyl-L-histidine (2S)-3-(1H-imidazol-4-yl)-2-(trimethylammonio)propanoate (S)-alpha-Carboxy-N,N,N-trimethyl-1H-imidazole-4-ethanaminium hydroxide, inner salt 197.116 197.23442 C9H15N3O2 CAS:534-30-5 CHEBI:12673 CHEBI:15781 CHEBI:21909 CHEBI:7460 C[N+](C)(C)[C@@H](Cc1c[nH]cn1)C([O-])=O GPPYTCRVKHULJH-QMMMGPOBSA-N Hercynine InChI=1S/C9H15N3O2/c1-12(2,3)8(9(13)14)4-7-5-10-6-11-7/h5-6,8H,4H2,1-3H3,(H-,10,11,13,14)/t8-/m0/s1 KEGG:C05575 Nalpha,Nalpha,Nalpha-Trimethyl-L-histidine chebi_ontology hercynine N-methyl-L-alpha-amino acid amino-acid betaine