estetrol(15alpha,16alpha,17beta)-estra-1(10),2,4-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-tetrol15alpha-hydroxyestriol3,15alpha,16alpha,17beta-tetrahydroxyestra-1,3,5(10)-trieneestra-1,3,5(10)-triene-3,15alpha,16alpha,17beta-tetroloestetrol