Oxabolone is a synthetic anabolic-androgenic steroid (AAS) of the nandrolone (19-nortestosterone) group which was never marketed. It can be formulated as the cipionate ester prodrug oxabolone cipionate, which, in contrast, has been marketed for medical use.
Oxabolone is on the World Anti-Doping Agency's list of prohibited substances, and is therefore banned from use in most major sports.
The 17ñ-methylated analogue of oxabolone is methylhydroxynandrolone (4-hydroxy-17ñ-methyl-19-nortestosterone) and the 17ñ- and 19-methylated derivative of oxabolone is oxymesterone (4-hydroxy-17ñ-methyltestosterone).