Estradiol enanthate

Estradiol enanthate (INN, USAN), or estradiol enantate, is a synthetic ester, specifically the 17-heptanoyl ester, of the natural estrogen, estradiol. It is marketed under the brand names Anafertin, Deladroxate, Perlutan, and Topasel, which are combination formulations of estradiol enanthate and dihydroxyprogesterone acetophenide, as a once-monthly injectable hormonal contraceptive in Spain and Latin America, and has been used as such since at least the mid-1960s. A 10 mg dose of estradiol enanthate via intramuscular injection has been found to result in elevated estradiol levels for up to 31 days.