(3s,5s,6s,8s,9s,10r,13r,14s,17r)-3-iodo-10,13-dimethyl-17-[(2r)-6-methylheptan-2-yl]spiro[1,2,3,4,5,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthrene-6,2'-1,3-dithiolane] 1',1'-dioxide