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7-PET: Wikis


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Systematic (IUPAC) name
CAS number  ?
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Chemical data
Formula C 31H39NO4  
Mol. mass 487.64 g/mol
Pharmacokinetic data
Bioavailability  ?
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Therapeutic considerations
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7-PET is a potent analgesic drug, 300 times the potency of morphine by weight.[1] It is related to the more well-known oripavine derivative opioid etorphine, which is used as a very potent veterinary painkiller and anesthetic medication, used primarily for the sedation of large animals such as elephants, giraffes and rhinos. 7-PET itself has a 3-O-methyl ether which reduces potency, but the 3-OH derivative is around 2200x morphine, almost the same potency as etorphine as a μ agonist,[2][3] and unexpectedly the 3-desoxy compound is also around the same potency of 2000x morphine.[4]

Unlike etorphine however, 7-PET is not an illegal drug, and is not controlled under the UN drug conventions, but it might still be considered to be a controlled substance analogue of etorphine on the grounds of its related chemical structure in some jurisdictions such as the USA, Canada, Australia and New Zealand.


  1. ^ Lewis JW, Bentley KW, Cowan A. Narcotic Analgesics and Antagonists. Annual Reviews in Pharmacology 1971;11:241-270.
  2. ^ Feinberg AP, Creese I, Snyder SH. The opiate receptor: a model explaining structure-activity relationships of opiate agonists and antagonists. Proceedings of the National Academy of Sciences U S A. 1976 Nov;73(11):4215-9.
  3. ^ Bentley KW, Lewis JW. Agonist and Antagonist Actions of Narcotic Analgesic Drugs. pp 7-16. University Park Press, Baltimore. (1973)
  4. ^ Lewis JW, Readhead MJ. Novel analgetics and molecular rearrangements in the morphine-thebaine group. XVIII. 3-Deoxy-6,14-endo-etheno-6,7,8,14-tetrahydrooripavines. Journal of Medicinal Chemistry. 1970 May;13(3):525-527. DOI: 10.1021/jm00297a041

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