Showing structure for (1r,5ar,7r,8r,9as,9br)-1-hydroxy-6,6,9a-trimethyl-8-{[(2z)-2-methylbut-2-enoyl]oxy}-1h,3h,5h,5ah,7h,8h,9h,9bh-naphtho[1,2-c]furan-7-yl (2z)-2-methylpent-2-enoate