[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a member of 4-pyranones. It has a role as a metabolite."}, {"from": "gpt", "value": "[C][C][=C][Branch1][#Branch2][C][=Branch1][C][=O][C][=C][O][Ring1][#Branch1][O]"}]