[{"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][N][O]"}, {"from": "gpt", "value": "The molecule is a tripeptide composed of one L-tyrosine and two glycine residues joined in sequence. It has a role as a metabolite. It is a tautomer of a Tyr-Gly-Gly zwitterion."}]