5α-Androstan-17β-ol-3-one

5α-Androstan-17β-ol-3-one, also referred to as androstanolone or dihydrotestosterone, is an anabolic steroid. Testosterone secreted by the testis is converted to dihydrotestosterone in the target tissues where it appears to mediate many of the biological actions of testosterone, including the development of the male phenotype during embryogenesis and at puberty.