3,3′-((3S,3’S,8R,8’R,9S,9’S,10R,10’R,13S,13’S,14S,14’S)-oxybis(10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthrene-17,3-diyl))dipyridine