[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is the conjugate base of 5-oxoproline. It has a role as a human metabolite. It is a conjugate base of a 5-oxoproline."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][N][C][Ring1][=Branch1][C][=Branch1][C][=O][O-1]"}]