Showing structure for methyl 6-[(3ar,4r,6s)-4-(acetyloxy)-6,9a,11a-trimethyl-7,10-dioxo-1h,2h,3h,3ah,4h,5h,5ah,6h,8h,9h,11h-cyclopenta[a]phenanthren-1-yl]-2-methyl-3-methylideneheptanoate