4-(((1R,2R,4aR,5R,8aS)-2-((3-Carboxypropanoyl)oxy)-1,4a-dimethyl-6-methylene-5-((E)-2-(2-oxo-2,5-dihydrofuran-3-yl)vinyl)decahydronaphthalen-1-yl)methoxy)-4-oxobutanoic acid

4-(((1R,2R,4aR,5R,8aS)-2-((3-Carboxypropanoyl)oxy)-1,4a-dimethyl-6-methylene-5-((E)-2-(2-oxo-2,5-dihydrofuran-3-yl)vinyl)decahydronaphthalen-1-yl)methoxy)-4-oxobutanoic acid,