This page uses content from Wikipedia and is licensed under CC BY-SA.


PNU-181731 structure.png
CAS Number
PubChem CID
Chemical and physical data
Molar mass186.25 g/mol g·mol−1
3D model (JSmol)

PNU-181731 is a drug which acts as an agonist at serotonin 5-HT2 receptors,[1][2] with strongest binding affinity for the 5-HT2C subtype at 4.8nM, and weaker 5-HT2A affinity of 18nM. It has anxiolytic effects in animal studies with around one tenth the potency of alprazolam and no significant ataxia or other side effects noted.[3]

See also


  1. ^ US 6734301, Ennis ME, et al., "2,3,4,5-Tetrahydro-1H-[1,4]diazepino[1,7-a]indole compounds.", published May 11, 2004, assigned to Pharmacia and Upjohn Co Inc 
  2. ^ US 8158617, Shirai J, et al., "Fused heterocyclic compound and use thereof.", published April 17, 2012, assigned to Takeda Pharmaceutical Co Ltd 
  3. ^ Ennis MD, Hoffman RL, Ghazal NB, Olson RM, Knauer CS, Chio CL, et al. (July 2003). "2,3,4,5-tetrahydro- and 2,3,4,5,11,11a-hexahydro-1H-[1,4]diazepino[1,7-a]indoles: new templates for 5-HT(2C) agonists". Bioorganic & Medicinal Chemistry Letters. 13 (14): 2369–72. doi:10.1016/S0960-894X(03)00403-7. PMID 12824036.