The molecule is an amino acid zwitterion arising from transfer of a proton from the carboxy to the amino group of L-tyrosine; major species at pH 7.3. It is a conjugate base of a L-tyrosinium. It is a conjugate acid of a L-tyrosinate(1-). It is a tautomer of a L-tyrosine.
(2S)-2-azaniumyl-3-(4-hydroxyphenyl)propanoate