[{"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][Branch2][Ring1][C][C][=Branch1][C][=O][O][/C][\\-Ring1][=Branch1][=C][Branch1][=Branch1][\\C][=Branch1][C][=O][O][/Cl][Cl]"}]