[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a natural product found in Laurencia majuscula and Laurencia dendroidea with data available."}, {"from": "gpt", "value": "[C][C][=C][C][=Branch1][C][=O][C][C][Branch1][#C][C@][Ring1][#Branch1][C][C][C][=Branch1][Ring1][=C][Br][C][=C][Ring1][Branch2][Branch1][C][C][C]"}]