four-CL-PVP CRYSTAL is intently similar in structure to the popular substituted cathinone α-PVP. Α-PVP alone was initial made during the 1960s. It rose to prevalent attractiveness among cathinone aficionados in 2013 as being a compound that had results remarkably similar to the stimulant MDPV (Methylenedioxypyrovalerone). Each of such chemica