Etynodiol diacetate

![Ethynodiol diacetate synthesis:[8] F. B. Colton, U.S. Patent 2,843,609 (1958 to Searle). Prepn of the 3-acetate, 17-acetate, and diacetate: P. D. Klimstra, U.S. Patent 3,176,013 (1965 to Searle); see also:[9]](/Images/godic/202501/06/Ethynodiol_diacetate_synthesis.svg0830.png")
Etynodiol diacetate (INN) (sold as Continuin, Femulen, Luteonorm, Luto-Metrodiol, and Metrodiol), or ethynodiol diacetate (USAN, BAN), also known as norethindrol diacetate, is a steroidal progestin which is used as a hormonal contraceptive. Relative to other 19-nortestosterone derivatives, it has relatively little or no potency as an androgen, and, unlike most progestins but similarly to noretynodrel, also has some estrogenic effects.