(4R)-4-[(3R,5R,7E,8R,9S,10S,12S,13R,14S,17R)-7-[(E)-[(3R,5R,8R,9S,10S,12S,13R,14S,17R)-17-[(2R)-4-carboxybutan-2-yl]-3,12-dihydroxy-10,13-dimethyl-1,2,3,4,5,6,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-7-ylidene]hydrazinylidene]-3,12-dihydroxy-10,13-dimethyl-1,2,3,4,5,6,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoic acid