The molecule is a zwitterion arising from transfer of a proton from the carboxy to the amino group of L-homocarnosine; major species at pH 7.3. It is a N-acyl-L-alpha-amino acid anion and a dipeptide zwitterion. It is a tautomer of a L-homocarnosine.
(2S)-2-(4-azaniumylbutanoylamino)-3-(1H-imidazol-5-yl)propanoate