[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a natural product found in Nigrospora sacchari, Streptomyces griseoviridis, and Hypomyces chrysospermus with data available."}, {"from": "gpt", "value": "[C][/C][=C][/C@@H1][Branch1][O][C@@H1][C][=C][C][=Branch1][C][=O][O][Ring1][=Branch1][O]"}]