[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is under investigation in clinical trial NCT01043263 (Efficacy and Safety of EN3324 (Axomadol) in Subjects With Chronic Low Back Pain)."}, {"from": "gpt", "value": "[C][N][Branch1][C][C][C][C@@H1][C][C][C@@H1][Branch2][Ring1][Ring2][C][C@][Ring1][=Branch1][Branch1][=N][C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][O][C][O][O]"}]