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