Superdrol (methyldrostanolone) Androgenic 20 Anabolic 400 Chemical Names 2a, 17a-dimethyl-5a-androstane- 17b-ol-3-one Estrogenic Activity none Progestational Activity no data available Description Methyldrostanolone, also known as methasteron, is a potent oral anabolic steroid that was never sold as a prescription drug. In structure, this steroid is a close derivative of drostanolone (Masteron). The only difference in this case is the addition of a C-17 alpha methyl group, a modificatio…