Showing structure for (3r,5s,8s,11s,12s,13s,15r,16s)-5-[(acetyloxy)methyl]-13-hydroxy-2,11,12-trimethyl-6-oxo-7,17-dioxapentacyclo[10.3.1.1³,¹⁵.0⁵,¹⁵.0⁸,¹³]heptadec-1-en-16-yl (2z)-2-methylbut-2-enoate