(E)-4-((R)-2-((3aR,4R,5R,7R,8S,9R,9aS,12R)-5-(2-((2-(diethylamino)ethyl)thio)acetoxy)-8-hydroxy-4,7,9,12-tetramethyl-3-oxodecahydro-4,9a-propanocyclopenta[8]annulen-7-yl)-2-hydroxyethoxy)-4-oxobut-2-enoic acid
(E)-4-((R)-2-((3aR,4R,5R,7R,8S,9R,9aS,12R)-5-(2-((2-(diethylamino)ethyl)thio)acetoxy)-8-hydroxy-4,7,9,12-tetramethyl-3-oxodecahydro-4,9a-propanocyclopenta[8]annulen-7-yl)-2-hydroxyethoxy)-4-oxobut-2-enoic acid