Α-PVP also named: α-Pyrrolidinopentiophenone, also alpha-pyrrolidinovalerophenone, alpha-PVP, O-2387, APVP, PVP, β-ketone-prolintane, Prolintanone. Synthetic excitatory cathinone class. Α-PVP was developed in the 1960s by flakka or gravel.