4-methylbuphedrone 4-methylbuphedrone 4-methylbuphedrone (also known as 4-memabp, bz-6378 and 4-methyl-α-methylamino-butyrophenone), is a stimulant drug of the cathinone class that has been sold online as a designer drug. 4-methylbuphedronelegal statuslegal status de: anlage i (authorized scientific use only) uk: class b identifiers iupac name 2-(methylamino)-1-(4-methylphenyl)-1-butanone cas number1336911-98-8 ypubchem cid71750237chemspider26702147unii4y78frb99gcomptox dashboard (epa)dtxsid001014193 chemical and physical dataformulac12h17nomolar mass191.274 g·mol−13d model (jsmol)interactive image smiles cc1=cc=c(c(c(cc)nc)=o)c=c1.cl inchi inchi=1s/c12h17no.clh/c1-4-11(13-3)12(14)10-7-5-9(2)6-8-10;/h5-8,11,13h,4h2,1-3h3;1hkey:cnsoprivfkvrdh-uhfffaoysa-n it was first reported to the emcdda in november 2011. legal status 4-methylbuphedrone is listed in anlage i and therefore illegal in germany. as of october 2015 4-memabp is a controlled substance in china. in the united states 4-methylbuphedrone is considered a schedule 1 controlled substance as a positional isomer of 4-methylethcathinone (4-mec)