[{"from": "human", "value": "Provide a description of 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][C]"}, {"from": "gpt", "value": "The molecule is a 6-methoxy-11-methyl-1,3,4,9,10,10a-hexahydro-2H-10,4a-(epiminoethano)phenanthrene in which the stereocenters at positions 4a, 10 and 10a have R-configuration. It is a prodrug of levorphanol and a strong narcotic analgesic, and listed as a schedule II controlled substance. It has a role as an opioid analgesic and a prodrug. It is functionally related to a Levorphanol. It is an enantiomer of a dextromethorphan."}]