[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a butenolide."}, {"from": "gpt", "value": "[C][C][O][C][=C][Branch1][#C][C@H1][Branch1][=Branch1][O][C][Ring1][Branch1][=O][C@H1][Branch1][Ring1][C][O][O][O]"}]