Buy Pentylone onlinePentylone DescriptionPentylone is a stimulant developed in the 1960s. It is a substituted cathinone. It has been identified in some samples of powders sold as "NRG-1", along with varying blends of other cathinone derivatives including flephedrone, MDPBP, MDPV and 4-MePPP. Wikipedia Molar mass: 235.278 g/mol ChemSpider ID: 29786041 PubChem CID: 60208608 People also search for: Eutylone, Methylone, Butylone.