fg-8205 fg-8205 fg-8205 (l-663,581) is an imidazobenzodiazepine derivative related to bretazenil, which acts as a partial agonist at gabaa receptors, with slight selectivity for the α1-containing subtype. in animal tests it has anxiolytic and anticonvulsant effects but with little sedation or ataxia produced. fg-8205identifiers iupac name 7-chloro-5-methyl-3-(5-propan-2-yl-1,2,4-oxadiazol-3-yl)-4h-imidazobenzodiazepin-6-one cas number122384-14-9 ypubchem cid129710chemspider114837 yunii7v0i080855chemblchembl307202 ycomptox dashboard (epa)dtxsid40153589 chemical and physical dataformulac17h16cln5o2molar mass357.80 g·mol−13d model (jsmol)interactive image smiles clc4cccc3n2cnc(c1nc(on1)c(c)c)c2cn(c(=o)c34)c inchi inchi=1s/c17h16cln5o2/c1-9(2)16-20-15(21-25-16)14-12-7-22(3)17(24)13-10(18)5-4-6-11(13)23(12)8-19-14/h4-6,8-9h,7h2,1-3h3 ykey:sewxzwmbvgjjpg-uhfffaoysa-n y ny (what is this?) (verify)