metizolam metizolam metizolam (also known as desmethyletizolam) is a thienotriazolodiazepine that is the demethylated analogue of the closely related etizolam. metizolamclinical datadependenceliabilitymoderateroutes ofadministrationoral, sublingual, rectallegal statuslegal status ca: unscheduled de: npsg (industrial and scientific use only) uk: under psychoactive substances act illegal in sweden identifiers iupac name 4-(2-chlorophenyl)-2-ethyl-6h-thienotriazolodiazepine cas number40054-68-0 ypubchem cid12434325chemspider59207712uniik1c6xi9llxchemblchembl4782672chemical and physical dataformulac16h13cln4smolar mass328.82 g·mol−13d model (jsmol)interactive image smiles clc1=c(c=cc=c1)c3=ncc2=nn=c2c4=c3c=c(s4)cc inchi inchi=1s/c16h13cln4s/c1-2-10-7-12-15(11-5-3-4-6-13(11)17)18-8-14-20-19-9-21(14)16(12)22-10/h3-7,9h,2,8h2,1h3key:nqsswdkqlvbuqn-uhfffaoysa-n legal status following its sale as a designer drug, metizolam was classified as controlled substance in sweden on 26. january 2016.