ipsapirone ipsapirone ipsapirone is a selective 5-ht1a receptor partial agonist of the piperazine and azapirone chemical classes. it has antidepressant and anxiolytic effects. ipsapirone was studied in several placebo-controlled trials for depression and continues to be used in research. ipsapironeclinical dataroutes ofadministrationoralatc codenonelegal statuslegal status in general: uncontrolled pharmacokinetic dataelimination half-life1.3-2.7 hoursidentifiers iupac name 9,9-dioxo-8--9λ6-thia-8-azabicyclonona-1,3,5-trien-7-one cas number95847-70-4 ypubchem cid56971iuphar/bps42chemspider51365 yunii6j9b11mn0kchemblchembl8412 ycomptox dashboard (epa)dtxsid4045688 chemical and physical dataformulac19h23n5o3smolar mass401.49 g·mol−13d model (jsmol)interactive image smiles o=c2c1ccccc1s(=o)(=o)n2ccccn4ccn(c3ncccn3)cc4 inchi inchi=1s/c19h23n5o3s/c25-18-16-6-1-2-7-17(16)28(26,27)24(18)11-4-3-10-22-12-14-23(15-13-22)19-20-8-5-9-21-19/h1-2,5-9h,3-4,10-15h2 ykey:tzjuvviwvwflcd-uhfffaoysa-n y (verify)