[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a butenolide."}, {"from": "gpt", "value": "[C][C][C@@][Branch1][=N][C@@][Ring1][Ring2][C][=C][C][=Branch1][C][=O][O][Ring1][=Branch1][C][=C][C][=Branch1][C][=O][O][Ring1][N]"}]