19-Norandrostenedione
19-Norandrostenedione refers to two steroid isomers that were once marketed as dietary supplements and mainly used by body builders. After 2005, 19-Norandrostenedione was regulated in the United States as a schedule III controlled substance, as well as banned from use in competitive sports by the World Anti-Doping Agency.    In the body 19-norandrostenedione is rapidly metabolized into [nandrolone], also known as nortestosterone.