[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a delta-lactone."}, {"from": "gpt", "value": "[C][=C][C@@][Branch2][Ring1][=Branch2][C@@H1][C@@H1][Ring1][Branch1][C@@H1][Branch1][=N][O][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=Branch1][C][=O][N][O][C][Ring1][N][=O][O]"}]