Showing structure for (2r,3r)-3-[(10s,11r)-3,4,5,17,18,19-hexahydroxy-8,14-dioxo-11-(3,4,5-trihydroxybenzoyloxy)-9,13-dioxatricyclo[13.4.0.0²,⁷]nonadeca-1(19),2(7),3,5,15,17-hexaen-10-yl]-2,3-dihydroxypropanoic acid