Showing structure for [(1r,3ar,5ar,5br,7ar,8r,11ar,11br,13ar,13bs)-3a,5a,5b,8,11a-pentamethyl-9-oxo-1-(3-oxoprop-1-en-2-yl)-tetradecahydro-1h-cyclopenta[a]chrysen-8-yl]methyl acetate