fasiplon fasiplon fasiplon (ru 33203) is a nonbenzodiazepine anxiolytic drug from the imidazopyrimidine family of drugs. fasiplonclinical dataatc codenoneidentifiers iupac name 6-ethyl-7-methoxy-5-methyl-2-(5-methyl-oxadiazol-3-yl)-imidazopyrimidine cas number106100-65-6 ypubchem cid208954chemspider181047 nuniixca050ipgbchemblchembl62735 ncomptox dashboard (epa)dtxsid70147512 chemical and physical dataformulac13h15n5o2molar mass273.296 g·mol−13d model (jsmol)interactive image smiles cc1=nc(c2=cn3c(n=c(oc)c(cc)=c3c)=n2)=no1 inchi inchi=1s/c13h15n5o2/c1-5-9-7(2)18-6-10(11-14-8(3)20-17-11)15-13(18)16-12(9)19-4/h6h,5h2,1-4h3 nkey:mebykplmxiryrq-uhfffaoysa-n n ny (what is this?) (verify) fasiplon binds strongly to benzodiazepine sites on the gabaa receptor and has similar anxiolytic effects in animals, but with less sedative or muscle relaxant action. it was developed by a team at roussel uclaf in the 1990s