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