A new research chemical that is an analogue of a-PVP is TH-PVP CAS # 583123-2-1. Its formal name, IUPAC or 2-(pyrrolidine-1-yl)-1-(5,6,7,8-tetrahydronaphthalen-2-yl)pentan-1-one, is a chemical formula of C19H27NO and has a molecular weight of 285.422.