InChI=1S/C19H22N4O5/c1-4-22-17-16(18(26)23(9-10-24)19(22)27)21(2)15(20-17)8-6-12-5-7-13(25)14(11-12)28-3/h5-8,11,24-25H,4,9-10H2,1-3H3/b8-6+