[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a natural product found in Roccella montagnei with data available."}, {"from": "gpt", "value": "[C][C][=C][C][=Branch2][Ring1][O][=C][Branch1][Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][O][C][=Branch1][C][=O][O][C][C@@H1][Branch1][#Branch1][C@H1][Branch1][Ring1][C][O][O][O][O]"}]