[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an amino acid zwitterion obtained from 4-oxoproline by transfer of a proton from the alpha-carboxy group to the amino group; major species at pH 7.3. It is a tautomer of a 4-oxoproline."}, {"from": "gpt", "value": "[C][C][Branch1][#Branch1][NH2+1][C][C][Ring1][Branch1][=O][C][=Branch1][C][=O][O-1]"}]