Synonyms: Estra-1,3,5(10)-triene-3,15,16,17-tetrol, (15α,16α,17β)-;15a-Hydroxyestriol;(15α,16α,17β)-estra-1,3,5(10)-triene-3,15,16,17-tetrol;(8R,9S,13S,14S,15R,16R,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,15,16,17-tetrol;