Showing structure for 9-{[2-({4-[(2r)-4,4-dimethyl-5-[({7-oxofuro[3,2-g]chromen-9-yl}oxy)methyl]spiro[1,3-dioxolane-2,7'-furo[3,2-g]chromen]-9'-yloxy]-3-hydroxy-2-methylbutan-2-yl}oxy)-3-methylbut-3-en-1-yl]oxy}furo[3,2-g]chromen-7-one