[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a natural product found in Sargassum vachellianum, Sargassum thunbergii, and other organisms with data available."}, {"from": "gpt", "value": "[C][C@@H1][C@H1][Branch2][Ring1][=Branch2][C@@H1][Branch2][Ring1][Ring2][C@@H1][Branch1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][S][=Branch1][C][=O][=Branch1][C][=O][O][O][O][C]"}]