Showing structure for (1ar,2's,3as,4s,5s,5'r,6r,7ar,7bs)-6-(acetyloxy)-5'-(furan-3-yl)-5,7a,7b-trimethyl-hexahydro-1ah-spiro[naphtho[1,2-b]oxirene-4,3'-oxolan]-2'-yl acetate