InChI=1S/C20H20N6O2/c1-13(2)23-16-4-3-15-9-22-26(17(15)8-16)19-11-21-10-18(24-19)25-6-5-14(12-25)7-20(27)28/h3-6,8-13,23H,7H2,1-2H3,(H,27,28)