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 For more about us , please visit our site: https://afinechem.en.alibaba.com or https://afinepharm.en.alibaba.com/   Top Quality Estradiol Cypionate Powder,CAS 313-06-4 ,active pharmaceutical ingredient      Estradiol cypionate (INN, USAN) , or estradiol cipionate, also known as estradiol 3-cyclopentylpropionate, is a synthetic estrogen ester, specifically the 3-cyclopentylpropanoyl ester, of the natural estrogen estradiol. It was first introduced in 1952 by Upjohn in the United States, and has been in widespread use since. Estradiol cypionate behaves as a sustained-release prodrug to estradiol, and therefore is considered to be natural estrogen. Estradiol cypionate is absorbed more slowly than estradiol itself, and for that reason, can be administered less often. Compared to other commonly used estradiol esters, via the intramuscular route, estradiol cypionate was found to have the longest duration of action with a duration of ~11 days, while estradiol benzoate and estradiol valerate were found to last for 4–5 days and 7–8 days, respectively. Estradiol cypionate, as a depot injection, has been found to have equivalent effectiveness and pharmacokinetics (e.g., duration) via subcutaneous and intramuscular routes. However, subcutaneous injection is generally regarded as easier and less painful relative to intramuscular injection, and for these reasons, may result in comparatively greater patient compliance.      

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