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Thebaine (paramorphine), also known as codeine methyl enol ether, is an opiate alkaloid, its name coming from the Greek Θῆβαι, Thēbai (Thebes), an ancient city in Upper Egypt. A minor constituent of opium , thebaine is chemically similar to both morphine and codeine , but has stimulatory rather than depressant effects.
Oripavine is an opioid and the major metabolite of thebaine.It is the precursor to the semi-synthetic compounds etorphine and buprenorphine.Although this chemical compound has analgesic potency comparable to morphine, it is not used clinically due to severe adverse effects and a low therapeutic index.
Morphine. Synthesis of morphine-like alkaloids in chemistry describes the total synthesis of the natural morphinan class of alkaloids that includes codeine, morphine, oripavine, and thebaine and the closely related semisynthetic analogs methorphan, buprenorphine, hydromorphone, hydrocodone, isocodeine, naltrexone, nalbuphine, oxymorphone, oxycodone, and naloxone.
The psychoactive compounds found in the opium plant include morphine, codeine, and thebaine (figure below is wrong, thebaine is "3,6-Dimethoxy-"). Opiates have long been used for a variety of medical conditions, with evidence of opiate trade and use for pain relief as early as the eighth century AD. [4]
Opiates are alkaloid compounds naturally found in the Papaver somniferum plant (opium poppy). The psychoactive compounds found in the opium plant include morphine, codeine, and thebaine. Opiates have long been used for a variety of medical conditions with evidence of opiate trade and use for pain relief as early as the eighth century AD.
Of the major naturally occurring opiates of the morphinan type—morphine, codeine and thebaine—thebaine has no therapeutic properties (it causes seizures in mammals), but it provides a low-cost feedstock for the industrial production of at least four semi-synthetic opiate agonists, including hydrocodone, hydromorphone, oxycodone and ...
At least one manufacturer, Tasmanian Alkaloids, produces both high-morphine and high-thebaine/oripavine types of poppy straw concentrate; the latter is used by pharmaceutical manufacturers to make semi-synthetic and synthetic opioids such as hydrocodone, hydromorphone, oxycodone, oxymorphone, nalbuphine, naloxone, naltrexone, buprenorphine ...
Thebaine is an important precursor for manufacture of pharmaceuticals, and is more concentrated in the roots of Papaver somniferum than elsewhere. Other species of poppies, numbering in the hundreds, do not contain morphine or codeine in useful amounts, but may contain non-narcotic alkaloids like protopine , sanguinarine or berberine .