4-Methylethcathinone or 4-MEC is a chemical that bears a chemical resemblance to mephedrone. Due to its similarity to mephedrone, it is thought to be a stimulant and entactogen drug of the phenethylamine, amphetamine, and cathinone chemical classes. Molar mass: 191.27 g/mol Formula: C12H17NO ChemSpider ID: 25630091 Other names: 4-Methyl-N-ethylcathinone; 2-Ethylamino-1-p-tolylpropan-1-one PubChem CID: 52988258