InChI=1S/C20H28Cl4N2O4/c1-3-29-11-9-25(19(27)17(21)22)13-15-5-7-16(8-6-15)14-26(10-12-30-4-2)20(28)18(23)24/h5-8,17-18H,3-4,9-14H2,1-2H3