Showing structure for (1r,10s)-5,7,10,14-tetrahydroxy-6-(3-methylbut-2-en-1-yl)-2,17-dioxatetracyclo[8.7.0.0³,⁸.0¹¹,¹⁶]heptadeca-3,5,7,11,13,15-hexaen-9-one