InChI=1S/C21H22N4O6/c1-4-31-21(27)19-16(11-24-9-8-22-12-24)23-13(2)17(20(26)30-3)18(19)14-6-5-7-15(10-14)25(28)29/h5-10,12,18,23H,4,11H2,1-3H3