Gravar-mail: 6,7-Bis(bromo­meth­yl)-2,11,18,21,24,27-hexa­oxatetra­cyclo­[26.4.0.0(4,9).0(12,17)]dotriaconta-1(28),4,6,8,12(17),13,15,29,31-nona­ene dichloro­methane monosolvate