4-methylcathinone 4-methylcathinone 4-methylcathinone (also known as nor-mephedrone, 4-mc and nsc-60487), is a stimulant drug of the cathinone chemical class that has been sold online as a designer drug. it is a metabolite of the better known drug mephedrone (4-methylmethcathinone). 4-methylcathinonelegal statuslegal status de: npsg (industrial and scientific use only) uk: class b identifiers iupac name 2-amino-1-(4-methylphenyl)propan-1-one cas number31952-47-3hcl: 6941-17-9pubchem cid414532chemspider367058uniicy9hk59ok6chemical and physical dataformulac10h13nomolar mass163.220 g·mol−13d model (jsmol)interactive image smiles cc1=cc=c(c=c1)c(=o)c(c)n inchi inchi=1s/c10h13no/c1-7-3-5-9(6-4-7)10(12)8(2)11/h3-6,8h,11h2,1-2h3key:ohulhwhsujeyit-uhfffaoysa-n 4-methylcathinone displays a 2.4-fold selectivity to promote monoamine release via dat over sert as opposed to 309-fold selectivity for cathinone.