ocinaplon ocinaplon ocinaplon is an anxiolytic drug in the pyrazolopyrimidine family of drugs. other pyrazolopyrimidine drugs include zaleplon and indiplon. ocinaplonclinical dataatc codenoneidentifiers iupac name pyridin-2-yl-(7-pyridin-4-ylpyrazolopyrimidin-3-yl)methanone cas number96604-21-6 ypubchem cid216456iuphar/bps4277chemspider187602 yunii2h6kvc5e76keggd02617 ycomptox dashboard (epa)dtxsid00242362 chemical and physical dataformulac17h11n5omolar mass301.309 g·mol−13d model (jsmol)interactive image smiles o=c(c1cnn2c(ccnc12)c3ccncc3)c4ncccc4 inchi inchi=1s/c17h11n5o/c23-16(14-3-1-2-7-19-14)13-11-21-22-15(6-10-20-17(13)22)12-4-8-18-9-5-12/h1-11h ykey:oqjfbuofghpmsr-uhfffaoysa-n y (verify) ocinaplon has a similar pharmacological profile to the benzodiazepine family of drugs, but with mainly anxiolytic properties and relatively little sedative or amnestic effect. medical uses a 2019 review found tentative evidence of benefit in anxiety. mechanism of action the mechanism of action by which ocinaplon produces its anxiolytic effects is by modulating gabaa receptors, although ocinaplon is more subtype-selective than most benzodiazepines. availability development of ocinaplon is discontinued due to liver complications that occurred in one of the phase iii subjects. synthesis ocinaplon synthesis: u.s. patent 4,521,422