Showing structure for (5as,5br,7as,11as,11br,13s,13as,13br)-5b,8,8,11a,13a-pentamethyl-3-oxo-1h,5h,5ah,6h,7h,7ah,9h,10h,11h,11bh,12h,13h,13bh-chryseno[1,2-c]furan-13-yl acetate