Showing structure for methyl 3-[(3,4-dimethylpent-2-enoyl)oxy]-15,16-dihydroxy-9,13-dimethyl-4,10-dioxo-11-{[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-5,18-dioxapentacyclo[12.5.0.0¹,⁶.0²,¹⁷.0⁸,¹³]nonadec-11-ene-17-carboxylate