[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a butenolide."}, {"from": "gpt", "value": "[C][/C][=C][/C][C][Branch2][Ring1][=Branch2][C][Branch2][Ring1][Ring2][C][=C][Branch1][Ring2][O][Ring1][=Branch1][C][Branch1][=Branch1][O][C][Ring1][=Branch1][=O][Branch1][C][C][O][O][O]"}]