[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch1][#Branch1][N][C][C][Ring1][Branch1][=O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is the 4-isomer of oxoproline. It has a role as a metabolite. It is a conjugate acid of a 4-oxoprolinate. It is a tautomer of a 4-oxoproline zwitterion."}]