Showing structure for (3r,3ar,5as,5br,7ar,11ar,11br)-3-isopropyl-3a,5a,5b,8,8,11a-hexamethyl-1h,2h,3h,4h,5h,6h,7h,7ah,10h,11h,11bh,12h,13h-cyclopenta[a]chrysen-9-one