[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. Opioid analgesic for treatment of moderate to severe pain. FDA approved on Nov 20, 2008."}, {"from": "gpt", "value": "[C][C][C@@H1][Branch1][N][C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][O][C@@H1][Branch1][C][C][C][N][Branch1][C][C][C]"}]