Showing structure for (2z,6r)-6-[(4ar,6as,6bs,10ar,11bs)-4,4,6b,10,11b-pentamethyl-3-oxo-1h,2h,4ah,5h,6h,6ah,7h,8h,10ah-cyclohexa[a]fluoren-9-yl]-2-methylhept-2-enoic acid