4'-fluoro-α-pyrrolidinooctanophenone 4'-fluoro-α-pyrrolidinooctanophenone 4'-fluoro-α-pyrrolidinooctanophenone (also known as 4-fluoro-pv-9, fpop and 4-fluoro-α-pop) is a stimulant drug of the cathinone class which has been reported as a novel designer drug. 4'-fluoro-α-pyrrolidinooctanophenonelegal statuslegal status ca: schedule i de: npsg (industrial and scientific use only) uk: class b identifiers iupac name 1-(4-fluorophenyl)-2-(pyrrolidin-1-yl)octan-1-one cas number1829588-09-1 ypubchem cid121262705chemspider58858887unii5k4eoq3qzdchemical and physical dataformulac18h26fnomolar mass291.410 g·mol−13d model (jsmol)interactive image smiles fc1=cc=c(c=c1)c(c(cccccc)n2cccc2)=o inchi inchi=1s/c18h26fno/c1-2-3-4-5-8-17(20-13-6-7-14-20)18(21)15-9-11-16(19)12-10-15/h9-12,17h,2-8,13-14h2,1h3key:mnxighjmeajiev-uhfffaoysa-n legality 4-f-α-pop is illegal in japan.