[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a natural product found in Porella cordaeana, Porella navicularis, and other organisms with data available."}, {"from": "gpt", "value": "[C][C][=C][Branch2][Ring1][#C][C@][Branch2][Ring1][=Branch2][C][C][C][C@@][Branch1][Branch2][C@@H1][Ring1][=Branch1][C][C][Ring1][#Branch2][Branch1][C][C][C][C][C][=C][Branch1][C][C][C][C][=O][C][=O]"}]