Showing structure for [13-(acetyloxy)-1,6-dihydroxy-4,12,12,15-tetramethyl-14-[(3-methylbutanoyl)oxy]-5-oxotetracyclo[8.5.0.0²,⁶.0¹¹,¹³]pentadeca-3,8-dien-8-yl]methyl 2-methylbut-2-enoate