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.
Also Known As:
Epiestriol; (16alpha,17beta)-Estra-1,3,5(10)-Triene-3,16,17-Triol; (16beta,17beta)-Estra-1,3,5(10)-Triene-3,16,17-Triol; 16-alpha-Hydroxy-Estradiol; 16alpha,17beta-Estriol; 16beta-Hydroxy-Estradiol; Estra-1,3,5(10)-Triene-3,16beta,17beta-Triol; Ovestin; 16 alpha Hydroxy Estradiol; 16alpha,17beta Estriol; 16beta Hydroxy Estradiol; Estra-1,3,5(10)-triene-3,16,17-triol, (16alpha,17beta)-