a-D2PV Crystal chunks a-D2PV Crystal chunks is a research chemical belonging to the cathinone class. The IUPAC name for a-D2PV is 1-(4-fluorophenyl)-2-(pyrrolidin-1-yl)pentan-1-one, and its CAS number is N/A. In its crystal form, a-D2PV appears as white or off-white chunks with a high level of purity, typically 98.0% or higher. This compound is highly sought after by researchers studying the effects of cathinones on the brain and behavior due to its potent and unique properties.