[{"from": "human", "value": "Provide a description of this molecule. [C][=C][Branch1][O][C][=C][Branch1][=Branch1][C][=C][Ring1][=Branch1][O][O][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "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."}]