[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a natural product found in Pentanema britannicum with data available."}, {"from": "gpt", "value": "[C][C@H1][C][C@@H1][C@H1][Branch1][=C][C@@H1][Branch1][Branch2][C][=Branch1][C][=O][O][Ring1][=Branch1][C][O][C][C@@H1][Branch1][S][C@H1][C][Ring1][=C][=C][Branch1][Branch2][C][=Branch1][C][=O][C][Ring1][=Branch1][C][O]"}]