4-et-pvp 4-et-pvp 4-ethyl-alpha-pyrrolidinovalerophenone (4-et-pvp) is a recreational designer drug from the substituted cathinone family, with stimulant effects. it was first identified in hungary in march 2019. 4-ethyl-alpha-pvplegal statuslegal status ca: schedule i de: npsg (industrial and scientific use only) uk: class b identifiers iupac name 1-(4-ethylphenyl)-2-(pyrrolidin-1-yl)pentan-1-one pubchem cid165360206 chemical and physical dataformulac17h25nomolar mass259.393 g·mol−13d model (jsmol)interactive image smiles cccc(c(=o)c1ccc(cc)cc1)n1cccc1 inchi inchi=1s/c17h25no/c1-3-7-16(18-12-5-6-13-18)17(19)15-10-8-14(4-2)9-11-15/h8-11,16h,3-7,12-13h2,1-2h3key:dxqsrsyiycrpmm-uhfffaoysa-n