InChI=1S/C20H4Br4Cl4O5/c21-5-1-3-7(8-9(20(31)32)13(26)15(28)14(27)12(8)25)4-2-6(22)17(30)11(24)19(4)33-18(3)10(23)16(5)29/h1-2,29H,(H,31,32)