[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is under investigation in clinical trial NCT00588640 (Study of D-Methadone in Patients With Chronic Pain)."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][C][Branch1][O][C][C@H1][Branch1][C][C][N][Branch1][C][C][C][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]