Gravar-mail: (2E,25E)-11,14,17,33,36,39,42-Hepta­oxa­penta­cyclo­[41.4.0.0(5,10).0(18,23).0(27,32)]hepta­tetra­conta-1(43),2,5(10),6,8,18,20,22,25,27,29,31,44,46-tetra­decaene-4,24-dione