s-15535 s-15535 s-15535 is a phenylpiperazine drug which is a potent and highly selective 5-ht1a receptor ligand that acts as an agonist and antagonist (weak partial agonist) at the presynaptic and postsynaptic 5-ht1a receptors, respectively. it has anxiolytic properties. s-15535clinical dataatc codenoneidentifiers iupac name 1-(2,3-dihydro-1,4-benzodioxin-8-yl)-4-(2,3-dihydro-1h-inden-2-yl)piperazine cas number146998-34-7 ypubchem cid132787iuphar/bps26chemspider117196 nuniixe6ka72fcbchemblchembl49247 ncomptox dashboard (epa)dtxsid90163557 echa infocard100.150.279 chemical and physical dataformulac21h24n2o2molar mass336.435 g·mol−13d model (jsmol)interactive image smiles c1cn(ccn1c2cc3=cc=cc=c3c2)c4=c5c(=cc=c4)occo5 inchi inchi=1s/c21h24n2o2/c1-2-5-17-15-18(14-16(17)4-1)22-8-10-23(11-9-22)19-6-3-7-20-21(19)25-13-12-24-20/h1-7,18h,8-15h2 nkey:qjppemxoownicq-uhfffaoysa-n n ny (what is this?) (verify)