Showing structure for (1r,2s,3r,4r,4as,8ar)-2-(acetyloxy)-3-hydroxy-3,4,8,8a-tetramethyl-4-[2-(5-oxo-2h-furan-3-yl)ethenyl]-2,4a,5,6-tetrahydro-1h-naphthalen-1-yl acetate