InChI=1S/C19H20Cl2N2O5/c1-2-27-12-11-22(19(24)18(20)21)13-14-3-7-16(8-4-14)28-17-9-5-15(6-10-17)23(25)26/h3-10,18H,2,11-13H2,1H3