A-PiHP (also known as Alpha-PiHP, α-Pyrrolidinoisohexaphenone, 4′-Me-PVP and 4’M-PVP) is a stimulant research chemical which is a derivative of cathinone and pyrovalerone group of chemicals. α-PiHP is a full substitute for α-PVP and Pentedrone and it provides similar and even improved effects according to structure analysis.

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IUPAC: 4-methyl-1-phenyl-2-(pyrrolidin-1-yl)pentan-1-one
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