Showing structure for (1r,2s,3r,4r,4as,5r,8ar)-1-(acetyloxy)-3,5-dihydroxy-3,4,8a-trimethyl-8-methylidene-4-[(1e)-2-(5-oxo-2h-furan-3-yl)ethenyl]-hexahydronaphthalen-2-yl butanoate