The molecule is an amino acid zwitterion that is the conjugate base of cationic diphthine, formed via deprotonation of both carboxy groups and protonation of the primary amino group; major species at pH 7.3. It is a conjugate base of a diphthine.
(2S)-4-[5-[(2S)-2-azaniumyl-2-carboxylatoethyl]-1H-imidazol-2-yl]-2-(trimethylazaniumyl)butanoate