[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a terpene lactone. It has a role as a metabolite."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O][C][C@@H1][C@H1][C][C@H1][Ring1][Ring1][C@][Branch2][Ring1][O][C@H1][Ring1][=Branch1][C][C][=C][Branch1][P][C][=Branch1][C][=O][O][C@][Ring1][=Branch1][Branch1][Branch1][C@H1][Ring1][#Branch2][O][O][C][C][O][C]"}]