Estriol Glucuronide
Estriol glucuronide (E3G), or oestriol glucuronide, also known as estriol monoglucuronide, as well as estriol 16α-β-D-glucosiduronic acid, is a natural product, natural, steroidal estrogen and the glucuronic acid (β-D-glucopyranuronic acid) conjugate (biochemistry), conjugate of estriol. It occurs in high concentrations in the urine of pregnancy, pregnant women as a reversible reaction, reversibly formed metabolite of estriol. Estriol glucuronide is a prodrug of estriol, and was the major component of Progynon and Emmenin, estrogenic products manufactured from the urine of pregnant women that were introduced in the 1920s and 1930s and were the first oral administration, orally active estrogens. Emmenin was succeeded by Premarin (conjugated equine estrogens), which is sourced from the urine of pregnant mares and was introduced in 1941. Premarin replaced Emmenin due to the fact that it was easier and less expensive to produce. Estrogen glucuronides can be deglucuronidated into th ...
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