[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is zwitterionic form of 6-amino-2-oxohexanoic acid arising from transfer of a proton from the carboxy to the amino group; major species at pH 7.3. It is a tautomer of a 6-amino-2-oxohexanoic acid."}, {"from": "gpt", "value": "[C][Branch1][Ring2][C][C][NH3+1][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]"}]