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