[{"from": "human", "value": "Provide a description of this molecule. [C][C][C@H1][Branch2][Ring1][#Branch1][N][Branch1][Ring2][C][Ring1][Branch1][C][=Branch1][C][=O][C@H1][Branch1][=Branch2][C][C][=C][N][=C][N][Ring1][Branch1][NH3+1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a dipeptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of His-Pro. Major species at pH 7.3. It is a tautomer of a His-Pro."}]