Showing structure for methyl 15,16-dihydroxy-9,13-dimethyl-3-[(3-methylbut-2-enoyl)oxy]-4,12-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-10-ene-17-carboxylate