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4 Cl-PVP CRYSTAL is closely relevant in construction to the favored substituted cathinone α-PVP. Α-PVP itself was 1st designed during the sixties. It rose to prevalent recognition among cathinone aficionados in 2013 for a material that had effects remarkably similar to the stimulant MDPV (Methylenedioxypyrovalerone). Each of these chemical substa