Α-Pyrrolidinobutiophenone

α-Pyrrolidinobutiophenone (α-PBP) is a stimulant compound developed in the 1960s which has been reported as a novel designer drug. It can be thought of as the homologue lying between the two better known drugs α-PPP and α-PVP. == Legality == In the United States, it is a Schedule I controlled substance.