[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][=Branch2][Ring1][=N][=C][C][=C][Ring1][=Branch1][C][C@@H1][Branch2][Ring1][C][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][O-1][NH3+1][O]"}, {"from": "gpt", "value": "The molecule is a tripeptide zwitterion resulting from the transfer of a proton from the carboxy group to the amino group of Tyr-Gly-Gly. Major microspecies at pH 7.3. It is a tautomer of a Tyr-Gly-Gly."}]