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