 Norethandrolone, also known as 17α-ethyl-19-nortestosterone or as 17α-ethylestr-4-en-17β-ol-3-one, is a synthetic estrane steroid and a 17α-alkylated derivative of testosterone and 19-nortestosterone (nandrolone).It is closely related to normethandrone (17α-methyl-19-nortestosterone) and to ethylestrenol (3-deketo-17α-ethyl-19-nortestosterone).Chemical syntheses of norethandrolone have been published.