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