[{"from": "human", "value": "Describe this molecule. [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]"}, {"from": "gpt", "value": "The molecule is under investigation in clinical trial NCT01043263 (Efficacy and Safety of EN3324 (Axomadol) in Subjects With Chronic Low Back Pain)."}]