En metabolit av östradiol och normalt den allra vanligaste östrogena metaboliten i urin. Under graviditeten producerar moderkakan stora mängder östriol. Det har också utvunnits ur växter. Även 16-beta-isomeren har påvisats i urin från gravida kvinnor.
A hydroxylated metabolite of ESTRADIOL or ESTRONE that has a hydroxyl group at C3, 16-alpha, and 17-beta position. Estriol is a major urinary estrogen. During PREGNANCY, a large amount of estriol is produced by the PLACENTA. Isomers with inversion of the hydroxyl group or groups are called epiestriol.
Estriol
16alpha,17beta-Estriol — 16alpha,17beta Estriol — (16alpha,17beta)-Estra-1,3,5(10)-Triene-3,16,17-Triol — 16-alpha-Hydroxy-Estradiol — 16 alpha Hydroxy Estradiol — Ovestin — Epiestriol — 16beta-Hydroxy-Estradiol — 16beta Hydroxy Estradiol — (16beta,17beta)-Estra-1,3,5(10)-Triene-3,16,17-Triol — Estra-1,3,5(10)-Triene-3,16beta,17beta-Triol