4-fluoroethcathinone 4-fluoroethcathinone 4-fluoroethcathinone (also known as 4-fec) is a stimulant of the cathinone class and structural analog of flephedrone (4-fluoromethcathinone) that has been sold as designer drug. 4-fluoroethcathinonelegal statuslegal status ca: schedule i de: npsg (industrial and scientific use only) uk: class b identifiers iupac name 2-(ethylamino)-1-(4-fluorophenyl)propan-1-one cas number1225625-74-0 ypubchem cid82100444chemspider25630443uniiml7h977fpmchemical and physical dataformulac11h14fnomolar mass195.237 g·mol−13d model (jsmol)interactive image smiles ccnc(c)c(=o)c1=cc=c(c=c1)f inchi inchi=1s/c11h14fno/c1-3-13-8(2)11(14)9-4-6-10(12)7-5-9/h4-8,13h,3h2,1-2h3key:kbnvgqpmfgsppt-uhfffaoysa-n