a-PiHP Crystal Chunks for sale a-PiHP Crystal Chunks is a potent research chemical belonging to the pyrrolidine family. The IUPAC name for a-PiHP Crystal Chunks is 1-phenyl-2-(pyrrolidin-1-yl)hexan-1-one, and its CAS number is N/A. This compound is highly sought after by researchers studying the effects of pyrrolidine compounds on the brain and behavior due to its unique and potent properties.