n-desalkylflurazepam n-desalkylflurazepam n-desalkylflurazepam (also known as norflurazepam) is a benzodiazepine analog and an active metabolite of several other benzodiazepine drugs including flurazepam, flutoprazepam, fludiazepam, midazolam, flutazolam, quazepam, and ethyl loflazepate. it is long-acting, prone to accumulation, and binds unselectively to the various benzodiazepine receptor subtypes. it has been sold as a designer drug from 2016 onward. n-desalkylflurazepamlegal statuslegal status ca: schedule iv de: npsg (industrial and scientific use only) uk: under psychoactive substances act identifiers iupac name 7-chloro-5-(2-fluorophenyl)-1,3-dihydro-1,4-benzodiazepin-2-one cas number2886-65-9pubchem cid4540chemspider4381uniix9u41nxr6mchemblchembl974comptox dashboard (epa)dtxsid30183057 echa infocard100.018.863 chemical and physical dataformulac15h10clfn2omolar mass288.71 g·mol−13d model (jsmol)interactive imagemelting point205 to 206 °c (401 to 403 °f) smiles fc1ccccc1c2=ncc(=o)nc3ccc(cl)cc23