[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a dipeptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of His-Ala. Major species at pH 7.3. It has a role as a metabolite. It is a tautomer of a His-Ala."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N][C][=Branch1][C][=O][C@H1][Branch1][=Branch2][C][C][=C][N][=C][N][Ring1][Branch1][NH3+1]"}]