The molecule is a L-histidine derivative that is L-histidine substituted at poisition 2 (on the imidazole ring) by a 3-carboxylato-3-(trimethylammonio)propyl group. It is an amino-acid betaine, a L-histidine derivative and a non-proteinogenic L-alpha-amino acid.
4-[5-[(2S)-2-amino-2-carboxyethyl]-1H-imidazol-2-yl]-2-(trimethylazaniumyl)butanoate