fletazepam fletazepam fletazepam is a drug which is a benzodiazepine derivative. it has sedative and anxiolytic effects similar to those produced by other benzodiazepine derivatives, but is mainly notable for its strong muscle relaxant properties. fletazepamclinical dataatc codenoneidentifiers iupac name 7-chloro-5-(2-fluorophenyl)-1-(2,2,2-trifluoroethyl)-2,3-dihydro-1,4-benzodiazepine cas number34482-99-0 ypubchem cid36834chemspider33806 yunii3ah8osq79okeggd04191 ycomptox dashboard (epa)dtxsid10188040 echa infocard100.047.309 chemical and physical dataformulac17h13clf4n2molar mass356.745 g·mol−13d model (jsmol)interactive image smiles fc1=cc=cc=c1c2=nccn(cc(f)(f)f)c3=c2c=c(cl)c=c3 inchi inchi=1s/c17h13clf4n2/c18-11-5-6-15-13(9-11)16(12-3-1-2-4-14(12)19)23-7-8-24(15)10-17(20,21)22/h1-6,9h,7-8,10h2 ykey:cizcsunubqxvfp-uhfffaoysa-n y (verify) fletazepam is most closely related to other n-trifluoroethyl substituted benzodiazepines such as halazepam and quazepam.