[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a morphinane alkaloid that is a hydrogenated ketone derivative of morphine. A semi-synthetic drug, it is a centrally acting pain medication of the opioid class. It has a role as an opioid analgesic and a mu-opioid receptor agonist. It is a morphinane alkaloid and an organic heteropentacyclic compound. It derives from a hydride of a morphinan."}, {"from": "gpt", "value": "[C][N][C][C][C@][C@@H1][C@H1][Ring1][=Branch1][C][C][=C][Ring1][=Branch1][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][C@H1][Ring1][=N][C][=Branch1][C][=O][C][C][Ring1][S]"}]