clazolam clazolam clazolam (sah-1123), also referred to as isoquinazepon, is a drug which is a fused benzodiazepine and tetrahydroisoquinoline derivative. it was developed in the 1960s but was never marketed. it possesses anxiolytic effects and is also claimed to have antidepressant properties. clazolamclinical dataatc codenoneidentifiers iupac name 2-chloro-5-methyl-5,9,10,14b-tetrahydroisoquinobenzodiazepin-6(7h)-one cas number7492-29-7 10171-69-4 (hcl)pubchem cid24107chemspider22534uniiyj53t77095keggd03531chemblchembl1723823comptox dashboard (epa)dtxsid50274072 chemical and physical dataformulac18h17cln2omolar mass312.80 g·mol−13d model (jsmol)interactive image smiles clc2ccc1n(c(=o)cn4c(c1c2)c3c(cccc3)cc4)c