Dianabol (Methandrostenolone)​ Raw Steroid Powder Basic Chemical Data: CAS: 72-63-9 Molecular formula: C20H28O2 Molecular weight: 300.44 Appearance: White or almost white powder. What is Dianabol (Methandrostenolone) ? Metandienone (brand names Averbol, Dianabol, Danabol, Metanabol, Naposim, Vetanabol), or methandienone, also known as methandrostenolone, as well as 17α-methyl-δ1-testosterone or as 17α-methylandrost-1,4-dien-17β-ol-3-one, is an orally active, synthetic anabolic-androgenic steroid (AAS) and a 17α-methylated derivative of testosterone (specifically, …