Showing structure for (1''r,2s,2'r,5''as,7''as,11''as,11''bs)-4,5,5'',5'',7''a,9'',11''b-heptamethyl-3,3'',5'-trioxo-2'',5''a,6'',7'',11'',11''a-hexahydro-1''h-dispiro[furan-2,4'-oxolane-2',8''-naphtho[2,1-c]oxepin]-1''-yl acetate