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