Among the testosterone derivatives, and in no particular order, levonorgestrel , norgestrel , norgestrienone , ethisterone ,  gestrinone ,  danazol ,  tibolone ,   normethandrone ,  and norvinisterone  have the greatest androgenic activity,      while norethisterone and its prodrugs ( norethisterone acetate , norethisterone enanthate , lynestrenol , etynodiol diacetate , and quingestanol acetate )  have moderate activity.     Testosterone derivatives with low (but potentially still significant) androgenic activity include desogestrel , etonogestrel , gestodene , and norgestimate ,    while norelgestromin ,  noretynodrel ,    norgesterone ,  allylestrenol ,  and dimethisterone  appear to have negligible activity. Dienogest and oxendolone are unique among the testosterone derivatives in that they are potent antiandrogens.  
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