InChI=1S/C20H20Cl2N2O5/c1-12-16(5-4-6-17(12)29-10-3-2-7-18(25)26)23-20(28)24-19(27)14-9-8-13(21)11-15(14)22/h4-6,8-9,11H,2-3,7,10H2,1H3,(H,25,26)(H2,23,24,27,28)