α-PCyP (α-PyrrolidinoCyclohexanoPhenone) is a stimulant drug of the cathinone class that has been sold online as a designer drug. In a series of alpha-substituted pyrrolidinyl cathinone derivatives developed in 2015, the alpha-cyclopentyl derivative was found to have around the same potency in vitro as an inhibitor of the dopamine transporter as the alpha-propyl derivative α-PVP, while the alpha-cyclohexyl derivative α-PCyP was around twice as strong.[2][3][4]