Showing structure for 4-[3,4-bis(acetyloxy)-2-(3,4-dimethoxyphenyl)-7-methoxy-3,4-dihydro-2h-1-benzopyran-6-yl]-2-(3,4-dimethoxyphenyl)-7-methoxy-3,4-dihydro-2h-1-benzopyran-3-yl acetate