(8R,8’R,9S,9’S,13S,13’S,14S,14’S,17S,17’S)-nonane-1,9-diylbis(3-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-17,7-diyl)diacetate