Showing structure for 1,6-dihydroxy-8-(hydroxymethyl)-4,12,15-trimethyl-12-{[(2-methylpropanoyl)oxy]methyl}-5-oxotetracyclo[8.5.0.0²,⁶.0¹¹,¹³]pentadeca-3,8-dien-13-yl 2-methylbut-2-enoate