Showing structure for 2-(3,4-dihydroxyphenyl)-4-(3-{[3-(3,4-dihydroxyphenyl)-1-methoxy-1-oxopropan-2-yl]oxy}-3-oxoprop-1-en-1-yl)-7-hydroxy-2,3-dihydro-1-benzofuran-3-carboxylic acid