mebroqualone mebroqualone mebroqualone (mbq) is a quinazolinone-class gabaergic and is an analogue of mecloqualone that has similar sedative and hypnotic properties to its parent compound, resulting from its agonist activity at the β subtype of the gabaa receptor. it was originally synthesized in the 1960s mebroqualone differs from mecloqualone by having a bromine atom instead of a chlorine on the 3-phenyl ring. it was made illegal in germany in 1998 but little other information is available. it would appear that this compound was sold on the black market in germany as a designer drug analogue of mecloqualone. mebroqualoneclinical dataatc codenonelegal statuslegal status de: anlage i (authorized scientific use only) identifiers iupac name 3-(2-bromophenyl)-2-methylquinazolin-4(3h)-one cas number4260-20-2 ypubchem cid364842chemspider323878 yuniist66s8f8eycomptox dashboard (epa)dtxsid20327105 chemical and physical dataformulac15h11brn2omolar mass315.170 g·mol−13d model (jsmol)interactive image smiles brc1=c(n2c(c3=cc=cc=c3n=c2c)=o)c=cc=c1 inchi inchi=1s/c15h11brn2o/c1-10-17-13-8-4-2-6-11(13)15(19)18(10)14-9-5-3-7-12(14)16/h2-9h,1h3 ykey:nbusapjnasskbp-uhfffaoysa-n y (verify)