SMILES: C1=C(C=C(C=C1O)O)[C@@H](C(=O)[O-])[NH3+]
Description: The molecule is an amino acid zwitterion obtained by transfer of a proton from the carboxy to the amino group of (S)-3,5-dihydroxyphenylglycine. It is a tautomer of a (S)-3,5-dihydroxyphenylglycine.