[{"from": "human", "value": "Describe this molecule. [C][C][C@H1][Branch1][C][C][C@@H1][Branch2][Ring1][Ring2][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][C][=Branch1][C][=O][O-1][N][C][=Branch1][C][=O][C@H1][Branch1][=N][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][NH3+1]"}, {"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-Ile-Leu. Major microspecies at pH 7.3. It is a tautomer of a Tyr-Ile-Leu."}]