Showing structure for 12-(acetyloxy)-4,7-dihydroxy-6-{2-hydroxy-11-methyl-5,7,10-trioxatetracyclo[6.3.1.0²,⁶.0⁹,¹¹]dodec-3-en-9-yl}-11-(hydroxymethyl)-6-methyl-3,9-dioxatetracyclo[6.6.1.0¹,⁵.0¹¹,¹⁵]pentadecan-14-yl 2-methylbut-2-enoate