y-23684 y-23684 y-23684 is an anxiolytic drug with a novel chemical structure, which is used in scientific research. it has similar effects to benzodiazepine drugs, but is structurally distinct and so is classed as a nonbenzodiazepine anxiolytic. y-23684identifiers iupac name 2-(4-chlorophenyl)-5,6-dihydro-benzothepinopyridazin-3(2h)-one-7-oxide cas number118288-67-8 npubchem cid195253chemspider169332 ycomptox dashboard (epa)dtxsid00922652 chemical and physical dataformulac18h13cln2o2smolar mass356.82 g·mol−13d model (jsmol)interactive image smiles clc1=cc=c(c=c1)n2n=c3c(ccs(c4=c3c=cc=c4)=o)=cc2=o inchi inchi=1s/c18h13cln2o2s/c19-13-5-7-14(8-6-13)21-17(22)11-12-9-10-24(23)16-4-2-1-3-15(16)18(12)20-21/h1-8,11h,9-10h2 ykey:whmcsfwqvgjbgm-uhfffaoysa-n y ny (what is this?) (verify) y-23684 is a nonselective partial agonist at gabaa receptors. it has primarily anxiolytic and anticonvulsant effects, with sedative and muscle relaxant effects only appearing at higher doses. it produces little ataxia or potentiation of other sedatives such as ethanol or barbiturates when compared to the benzodiazepines diazepam and clobazam in animal tests. y-23684 has a favourable pharmacological profile, producing strong anxiolytic and moderate anticonvulsant effects at low doses that cause little or no sedative side effects. it has been proposed for development for human medical use, but has not yet gone beyond animal tests.