Showing structure for (1r,2r,3s,4r,5s,7s,8r)-5-hydroxy-2,6,6,9-tetramethyl-3-{[(2z)-2-methylbut-2-enoyl]oxy}-11-oxotricyclo[5.4.0.0²,⁸]undec-9-en-4-yl (2z)-2-methylbut-2-enoate