[{"from": "human", "value": "What can you tell me about this molecule? [C][=C][C][=Branch2][Ring1][=Branch1][=C][C][=C][Ring1][=Branch1][C][C@@H1][Branch1][N][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][O-1][NH3+1][O]"}, {"from": "gpt", "value": "The molecule is a dipeptide zwitterion resulting from transfer of a proton from the carboxy to the amino group of L-tyrosylglycine; major species at pH 7.3. It is a tautomer of a Tyr-Gly."}]