Showing structure for methyl 2-(acetyloxy)-2-{4-[1-(furan-3-yl)-8a-methyl-3,6-dioxo-tetrahydro-1h-spiro[2-benzopyran-5,2'-oxiran]-3'-yl]-2,2,6-trimethyl-5-oxocyclohex-3-en-1-yl}acetate