<unk>  is a synthetic androstane steroid which was derived from testosterone and is also known by the following synonyms: * 17α-Ethynyltestosterone (or simply ethinyltestosterone or ethynyltestosterone) * 17α-Ethynylandrost-4-en-17β-ol-3-one * 17α-Pregn-4-en-20-yn-17β-ol-3-one (or simply pregneninolone or pregnenynolone) * 20,21-Anhydro-17β-hydroxyprogesterone (or simply anhydrohydroxyprogesterone) Closely related analogues of<unk>  include dimethisterone (6α,21-dimethylethisterone), norethisterone (19-norethisterone), and danazol (the 2,3-d-isoxazole ring-fused derivative of<unk> , as well as vinyltestosterone, allyltestosterone, methyltestosterone, ethyltestosterone, and propyltestosterone. Other<unk>  analogues include ethinylandrostenediol (17α-ethynyl-5-androstenediol), ethandrostate (17α-ethynyl-5-androstenediol 3β-cyclohexylpropionate), 17α-ethynyl-3α-androstanediol, and 17α-ethynyl-3β-androstanediol. Synthesis Chemical syntheses of<unk>  have been published.
Ethisterone
Metenolone acetate
Vinyltestosterone
Ethinylestradiol
Ethinylestradiol sulfonate
Fluoxymesterone
Formestane
Estradiol enantate