Quinbolone (Anabolicum Vister) is an anabolic steroid with weak androgenic effects. It was developed by Parke-Davis in an attempt to create a viable orally-administered anabolic steroid with little or no liver toxicity. The drug is atypical in that steroid molecules are usually only given officially distinct names when there is a permanent structural difference between the parent molecule and itself. Quinbolone, however, differs from its parent molecule solely by the addition of an easily removed cyclopentenyl ether group. Most orally administered anabolic steroids function by having an alkylated 17α-carbon atom, which prevents first-pass metabolism by the liver...