Showing structure for (2e,6r)-6-[(1r,3ar,5ar,9as,11ar)-3a,6,6,9a,11a-pentamethyl-7,10-dioxo-1h,2h,3h,4h,5h,5ah,8h,9h,11h-cyclopenta[a]phenanthren-1-yl]-2-methylhept-2-enal