<unk> , also known as 2,3-isoxazol-17α-ethynyltestosterone or as 17α-ethynyl-17β-hydroxyandrost-4-en-2,3-disoxazole, is a synthetic androstane steroid and a derivative of testosterone and ethisterone (17α-ethynyltestosterone). It is specifically the derivative of ethisterone where the C3 ketone is replaced with a 2,3-isoxazole moiety (i.e., an isoxazole ring is fused to the A ring at the C2 and C3 positions). Ethisterone is a weak progestin with weak androgenic activity.
Danazol
Gestodene
Algestone
Formestane
Telapristone
Hexestrol
Mifepristone
Promegestone