The molecule is a 16alpha-hydroxy steroid that is estriol in which the hydroxy group at position 17 has been epimersied from beta- to alpha- configuration. It is a metabolite of estradiol and a selective estrogen receptor beta (ER-beta) agonist. It has a role as an estrogen receptor agonist, a human urinary metabolite and an estrogen. It is a 16alpha-hydroxy steroid, a 17alpha-hydroxy steroid and a 3-hydroxy steroid. It derives from a hydride of an estrane.
(8R,9S,13S,14S,16R,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,16,17-triol