The molecule is an amino acid zwitterion obtained by transfer of a proton from the amino to the carboxy group of 4-O-dimethylallyl-L-tyrosine; major species at pH 7.3. It is a tautomer of a 4-O-dimethylallyl-L-tyrosine.
(2S)-2-azaniumyl-3-[4-(3-methylbut-2-enoxy)phenyl]propanoate