[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a gamma-lactone. It has a role as a metabolite."}, {"from": "gpt", "value": "[C][C@][Branch2][Ring2][O][C][=C][C@@H1][Branch2][Ring2][Ring2][C@@H1][C@@H1][C@@][Branch1][N][C@][Ring1][=Branch1][Branch1][=Branch1][C][C@@H1][Ring1][#Branch2][O][O][Branch1][O][C][C][C][C][Ring1][O][Branch1][C][C][C][C][=Branch1][C][=O][O][Ring1][P][O][C][=C]"}]