Showing structure for (1r,3r,8r,9r,10r,13s)-3-ethoxy-6,9,10-trimethyl-5-oxo-4,14-dioxatetracyclo[7.5.0.0¹,¹³.0³,⁷]tetradec-6-en-8-yl (2z)-2-methylbut-2-enoate