Andrographolide Impurity 9

4- ((5- ((E) -2- (4- ((4- ((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-oxobutanoyl) oxy) -2-oxotetrahydrofuran-3-yl) vinyl) -1- (((3-carboxypropanoyl) oxy) methyl) -1,4a-dimethyl-6-methylenedecahydronaphthalen-2-yl) oxy) -4-oxobutanoic acid