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Prodrug
11-Nor-9-carboxy-THC
Другие языки:

11-Nor-9-carboxy-THC

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Not to be confused with Tetrahydrocannabinolic acid.
11-Nor-9-carboxy-THC
11-COOH-THC.svg
THC-11-oic acid molecule
Clinical data
Pregnancy
category
  • Inconclusive
Routes of
administration		 Variable
Pharmacokinetic data
Bioavailability Variable
Metabolism Variable
Elimination half-life 5.2 to 6.2 days
Excretion Variable
Identifiers
  • 1-Hydroxy-6,6-dimethyl-3-pentyl-6a,7,8,10a-tetrahydrobenzo[c]chromene-9-carboxylic acid
CAS Number
PubChem CID
ChemSpider
UNII
ChEBI
CompTox Dashboard (EPA)
Chemical and physical data
Formula C21H28O4
Molar mass 344.451 g·mol−1
3D model (JSmol)
  • CCCCCc1cc(c2c(c1)OC(C3C2C=C(CC3)C(=O)O)(C)C)O
  • InChI=1S/C21H28O4/c1-4-5-6-7-13-10-17(22)19-15-12-14(20(23)24)8-9-16(15)21(2,3)25-18(19)11-13/h10-12,15-16,22H,4-9H2,1-3H3,(H,23,24) checkY
  • Key:YOVRGSHRZRJTLZ-UHFFFAOYSA-N checkY
 ☒NcheckY (what is this?)  (verify)

11-Nor-9-carboxy-Δ9-tetrahydrocannabinol (11-COOH-THC or THC-COOH), often referred to as 11-nor-9-carboxy-THC or THC-11-oic acid, is the main secondary metabolite of tetrahydrocannabinol (THC) which is formed in the body after cannabis is consumed.

Metabolism and detection

11-COOH-THC is formed in the body by oxidation of the active metabolite 11-hydroxy-THC (11-OH-THC) by liver enzymes. It is then metabolized further by conjugation with glucuronide, forming a water-soluble congener which can be more easily excreted by the body.

11-COOH-THC has a long half-life in the body of up to several days (or even weeks in very heavy users), making it the main metabolite tested for blood or urine testing for cannabis use. More selective tests are able to distinguish between 11-OH-THC and 11-COOH-THC, which can help determine how recently cannabis was consumed; if only 11-COOH-THC is present then cannabis was used some time ago and any impairment in cognitive ability or motor function will have dissipated, whereas if both 11-OH-THC and 11-COOH-THC are present then cannabis was consumed more recently and motor impairment may still be present.

Some jurisdictions where cannabis use is decriminalized or permitted under some circumstances use such tests when determining whether drivers were legally intoxicated and therefore unfit to drive, with the comparative levels of THC, 11-OH-THC and 11-COOH-THC being used to derive a "blood cannabis level" analogous to the blood alcohol level used in prosecuting impaired drivers. On the other hand, in jurisdictions where cannabis is completely illegal, any detectable levels of 11-COOH-THC may be deemed to constitute driving while intoxicated, even though this approach has been criticized as tantamount to prohibition of "driving whilst being a recent user of cannabis" regardless of the presence or absence of any actual impairment that might impact driving performance.

Effects

While 11-COOH-THC does not have any psychoactive effects in its own right, it may still have a role in the analgesic and anti-inflammatory effects of cannabis, and has also been shown to moderate the effects of THC itself which may help explain the difference in subjective effects seen between occasional and regular users of cannabis.

Legal status

The legal status of 11-nor-9-carboxy-THC varies among jurisdictions.

Australia

11-COOH-THC is a Schedule 8 prohibited substance in Western Australia under the Poisons Standard (July 2016). A schedule 8 substance is a controlled Drug – Substances which should be available for use but require restriction of manufacture, supply, distribution, possession and use to reduce abuse, misuse and physical or psychological dependence.

United States

Because 11-COOH-THC is substantially similar to the Schedule I controlled substance THC, possession or sale of 11-COOH-THC could be subject to prosecution under the Federal Analog Act.

See also


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