Chemistry:Pyrazolam

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Short description: Benzodiazepine
Pyrazolam
Pyrazolam-skeletal.svg
Clinical data
Routes of
administration
Oral, Sublingual, rectal
Legal status
Legal status
Pharmacokinetic data
Elimination half-life17 hours
Identifiers
CAS Number
PubChem CID
ChemSpider
UNII
ChEMBL
Chemical and physical data
FormulaC16H12BrN5
Molar mass354.211 g·mol−1
3D model (JSmol)

Pyrazolam (SH-I-04)[2] is a benzodiazepine derivative originally developed by a team led by Leo Sternbach at Hoffman-La Roche in the 1970s.[3] It has since been "rediscovered" and sold as a designer drug since 2012.[4][5][6][7][8][9][excessive citations]

Pyrazolam has structural similarities to alprazolam[10] and bromazepam. Unlike other benzodiazepines, pyrazolam does not appear to undergo metabolism, instead being excreted unchanged in the urine.[4]

Legal status

United Kingdom

In the UK, pyrazolam has been classified as a Class C drug by section 5 of the May 2017 amendment to The Misuse of Drugs Act 1971 along with several other designer benzodiazepine drugs.[11]

See also

References

  1. (customs (prohibited imports) regulations 1956 - schedule 4, 1956)
  2. "A Review of the Updated Pharmacophore for the Alpha 5 GABA(A) Benzodiazepine Receptor Model". International Journal of Medicinal Chemistry 2015: 430248. 2015. doi:10.1155/2015/430248. PMID 26682068. 
  3. Sternbach LH, Walser A, "Preparation of triazolo benzodiazepines and novel compounds", US patent 3954728, issued 4 May 1976, assigned to Hoffmann La Roche Inc.
  4. 4.0 4.1 "Characterization of the designer benzodiazepine pyrazolam and its detectability in human serum and urine". Forensic Toxicology 31 (2): 263–271. July 2013. doi:10.1007/s11419-013-0187-4. 
  5. "Designer benzodiazepines: A new challenge". World Psychiatry 14 (2): 248. June 2015. doi:10.1002/wps.20236. PMID 26043347. 
  6. "Detectability of designer benzodiazepines in CEDIA, EMIT II Plus, HEIA, and KIMS II immunochemical screening assays". Drug Testing and Analysis 9 (4): 640–645. April 2017. doi:10.1002/dta.2003. PMID 27366870. 
  7. "Blood concentrations of new designer benzodiazepines in forensic cases". Forensic Science International 268: 35–38. November 2016. doi:10.1016/j.forsciint.2016.09.006. PMID 27685473. 
  8. "Experimental versus theoretical log D7.4 , pKa and plasma protein binding values for benzodiazepines appearing as new psychoactive substances". Drug Testing and Analysis 10 (8): 1258–1269. March 2018. doi:10.1002/dta.2387. PMID 29582576. https://rke.abertay.ac.uk/en/publications/527a634d-decc-4d3a-bdca-08659bb13ed6. 
  9. "The blood-to-plasma ratio and predicted GABAA-binding affinity of designer benzodiazepines". Forensic Toxicology 40 (2): 349–356. July 2022. doi:10.1007/s11419-022-00616-y. PMID 36454409. 
  10. "6-phenyl-4H-s-triazolo[4,3-a][1,4]benzodiazepines which have central nervous system depressant activity". Journal of Medicinal Chemistry 14 (11): 1078–1081. November 1971. doi:10.1021/jm00293a015. PMID 5165540. 
  11. "The Misuse of Drugs Act 1971 (Amendment) Order 2017". legislation.gov.uk. http://www.legislation.gov.uk/uksi/2017/634/contents/made.