Umespirone

Umespirone
Clinical data
Routes of
administration		By mouth
ATC code
  • none
Legal status
Legal status
  • In general: uncontrolled
Pharmacokinetic data
Elimination half-lifeUnknown but effects last much longer than other azapirones, up to 23 hours after a single dose in human clinical studies.
Identifiers
  • 3-butyl-7-[4-[4-(2-methoxyphenyl)piperazin-1-yl]butyl]-9,9-dimethyl-3,7-diazabicyclo[3.3.1]nonane-2,4,6,8-tetrone
CAS Number
PubChem CID
ChemSpider
UNII
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC28H40N4O5
Molar mass512.651 g·mol−1
3D model (JSmol)
  • O=C1N(C(=O)C2C(=O)N(C(=O)C1C2(C)C)CCCCN4CCN(c3ccccc3OC)CC4)CCCC

Umespirone (KC-9172) is a drug of the azapirone class which possesses anxiolytic and antipsychotic properties. It behaves as a 5-HT1A receptor partial agonist (Ki = 15 nM), D2 receptor partial agonist (Ki = 23 nM), and α1-adrenoceptor receptor antagonist (Ki = 14 nM), and also has weak affinity for the sigma receptor (Ki = 558 nM). Unlike many other anxiolytics and antipsychotics, umespirone produces minimal sedation, cognitive/memory impairment, catalepsy, and extrapyramidal symptoms.

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