[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a natural product found in Laurencia nipponica with data available."}, {"from": "gpt", "value": "[C][C][C][Branch2][Ring1][#Branch2][C][C][C][=C][C][C][Branch1][Ring2][O][Ring1][#Branch1][C][Branch1][=Branch1][C][C][=C][C][#C][O][C][=Branch1][C][=O][C][Br]"}]