Английская Википедия:Ethinylestradiol sulfate

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Ethinylestradiol sulfate (EE sulfate), also known as 17α-ethynylestradiol 3-sulfate, is an estrogen ester – specifically, the C3 sulfuric acid (sulfate) ester of the synthetic estrogen ethinylestradiol (EE) – and is the major metabolite of EE.[1][2][3] Circulating levels of EE sulfate range from 6 to 22 times those of EE when EE is taken orally.[1][2][3] EE sulfate can be transformed back into EE (14–21%) via steroid sulfatase, and it has been suggested that EE sulfate may serve as a circulating reservoir for EE, similarly to the case of estrone sulfate with estradiol.[4][5][3][1] However, the EE sulfate pool with EE is far smaller than the pool of estrone sulfate that occurs with estradiol (with estrone sulfate levels approximately 200-fold higher than estradiol levels on average with oral estradiol).[1] In addition, in contrast to the case of estrone sulfate and estrone, the conversion rate of EE sulfate back into EE is relatively low, and has been said probably isn't of clinical significance.[5] However, other studies have suggested that EE sulfate may nonetheless contribute up to 20% of total EE levels.[2][6]

See also

References

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Шаблон:Steroid-stub Шаблон:Genito-urinary-drug-stub