InChI=1S/C21H26Cl2N2O6/c22-18-10-15(21-24-5-8-30-21)11-19(23)20(18)29-7-3-1-2-4-17-12-16(25-31-17)13-28-14-27-9-6-26/h10-12,26H,1-9,13-14H2