Showing structure for 9-hydroxy-4a,6a,6b,8a,11,11,14b-heptamethyl-4h,4bh,5h,6h,7h,8h,9h,10h,12h,12ah,14h,14ah,15h,16h,16ah-piceno[3,4-d][1,3]dioxin-2-one