Showing structure for 6-(7-{[3,4-dihydroxy-6-(hydroxymethyl)-5-methoxyoxan-2-yl]oxy}-10-hydroxy-9-methoxy-3-methyl-1h,3h,4h-naphtho[2,3-c]pyran-5-yl)-10-hydroxy-7,9-dimethoxy-3-methyl-1h,3h,4h-naphtho[2,3-c]pyran-4-yl acetate