Showing structure for (2r)-2-[(1r,2r,3ar,5ar,7r,9as,11ar)-7-(acetyloxy)-2-hydroxy-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5,6-dimethylhept-6-enoic acid