[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a natural product found in Plocamium mertensii, Gelidium sesquipedale, and other organisms with data available."}, {"from": "gpt", "value": "[C][C@@][Branch2][Ring1][C][C][C@@][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][C@@H1][Ring1][=Branch1][Br][Cl][Branch1][C][C][Cl][/C][=C][/Cl]"}]