The molecule is an amino acid zwitterion obtained by transfer of a proton from the carboxy group to the primary amino group of 7-(3-methylbut-2-enyl)-L-tryptophan. Major species at pH 7.3. It is a tautomer of a 7-(3-methylbut-2-enyl)-L-tryptophan.
(2S)-2-azaniumyl-3-[7-(3-methylbut-2-enyl)-1H-indol-3-yl]propanoate