Showing structure for 16-{[3,4-dihydroxy-6-(hydroxymethyl)-5-methoxyoxan-2-yl]oxy}-2,5,18-trihydroxy-7,9,13-trioxapentacyclo[10.8.0.0³,¹⁰.0⁴,⁸.0¹⁴,¹⁹]icosa-1,3(10),11,14,16,18-hexaen-20-one