[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a D-alpha-amino acid zwitterion arising from transfer of a proton from the carboxy to the amino group of D-alpha-phenylglycine; major species at pH 7.3. It is a tautomer of a D-alpha-phenylglycine."}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]