[{"from": "human", "value": "What can you tell me about this molecule? [C][N][C][C][C@][C][C][C][C][C@H1][Ring1][=Branch1][C@H1][Ring1][#Branch2][C][C][=C][Ring1][#Branch2][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O]"}, {"from": "gpt", "value": "The molecule is a synthetic opioid which is used as a narcotic analgesic for moderate-to-severe pain or as a preoperative medication. Levorphanol has not been linked to serum enzyme elevations during therapy or to clinically apparent liver injury."}]