5-methylmethiopropamine 5-methylmethiopropamine 5-methylmethiopropamine (5-mmpa, mephedrene) is a stimulant drug which is a ring-substituted derivative of methiopropamine. it is not a substituted cathinone derivative like mephedrone, as it lacks a ketone group at the β position of the aliphatic side chain, but instead more closely resembles substituted amphetamines. it has been sold as a designer drug, first being identified in germany in june 2020. 5-methylmethiopropaminelegal statuslegal status de: npsg (industrial and scientific use only) uk: under psychoactive substances act identifiers iupac name n-methyl-1-(5-methylthiophen-2-yl)propan-2-amine cas number1340105-79-4 ypubchem cid64487873chemspider46249721uniizp92fk3kk5chemical and physical dataformulac9h15nsmolar mass169.29 g·mol−13d model (jsmol)interactive image smiles cc1=cc=c(s1)cc(c)nc inchi inchi=1s/c9h15ns/c1-7(10-3)6-9-5-4-8(2)11-9/h4-5,7,10h,6h2,1-3h3key:hzicdjqmprfrkc-uhfffaoysa-n