[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a natural product found in Pestalotiopsis besseyi with data available."}, {"from": "gpt", "value": "[C][/C][=C][/C][=C][Branch1][#Branch1][C][O][C][Ring1][Branch1][=O][C][C@@H1][C@H1][Branch1][Ring2][O][Ring1][Ring1][C]"}]