3f-pihp 3f-pihp 3f-pihp (3f-α-phip) is a recreational designer drug from the substituted cathinone family, with stimulant effects. it was first identified in both sweden and finland in mid-2019, and was made illegal in finland in august 2019. 3f-pihplegal statuslegal status ca: schedule i de: npsg (industrial and scientific use only) uk: class b identifiers iupac name 1-(3-fluorophenyl)-4-methyl-2-(pyrrolidin-1-yl)pentan-1-one pubchem cid163192825chemical and physical dataformulac16h22fnomolar mass263.356 g·mol−13d model (jsmol)interactive image smiles o=c(c(cc(c)c)n1cccc1)c2=cc(f)=cc=c2