1-Androstenediol

1-Androstenediol, or 5α-androst-1-ene-3β,17β-diol, also known as 4,5α-dihydro-δ$1$-4-androstenediol, is a prohormone of 1-testosterone (Δ$1$-DHT). It has been used as a dietary supplement, and is identified by the World Anti-Doping Agency as a prohibited substance related to anabolic steroids.