<unk> , or<unk> , sold under the brand names Demulen and Femulen among others, is a progestin medication which is used in birth control pills. The medication is available only in combination with an estrogen. It is taken by mouth.<unk>  is a progestin, or a synthetic progestogen, and hence is an agonist of the progesterone receptor, the biological target of progestogens like progesterone. It has weak androgenic and estrogenic activity and no other important hormonal activity. The medication is a prodrug of norethisterone in the body, with<unk>  occurring as an intermediate.<unk> , a related compound, was discovered in 1954, and<unk>  was introduced for medical use in 1965. The medication remains available today only in the United States, Canada, and a few other countries.
Etynodiol diacetate
Bolandiol dipropionate
Tetramethyl bisphenol F
Chlormerodrin
Oxabolone cipionate
Beta-Zearalenol
Tienilic acid
Diethylstilbestrol disulfate