[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][C][C@][Branch2][Ring2][Branch1][C@@H1][C][C][=C][Branch2][Ring1][Branch1][C@@][Ring1][=Branch1][Branch1][Ring2][C][Ring1][#Branch2][C][C][N][Ring1][=Branch2][C][C][C][C][C][Ring1][Ring2][C][=C][Branch1][Branch1][C][=C][Ring1][S][O][O]"}, {"from": "gpt", "value": "The molecule is only found in individuals that have used or taken this drug. It is a synthetic morphinan analgesic with narcotic antagonist action. It is used in the management of severe pain. The exact mechanism of action is unknown, but is believed to interact with an opiate receptor site in the CNS (probably in or associated with the limbic system). The opiate antagonistic effect may result from competitive inhibition at the opiate receptor, but may also be a result of other mechanisms. Butorphanol is a mixed agonist-antagonist that exerts antagonistic or partially antagonistic effects at mu opiate receptor sites, but is thought to exert its agonistic effects principally at the kappa and sigma opiate receptors."}]