(2r,3s,4r,6s)-6-[1-[(10r,13r,14s,17s)-3,14-dihydroxy-10,13-dimethyl-1,2,3,4,7,8,9,11,12,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]ethoxy]-2-methyloxane-3,4-diol