InChI=1S/C18H22N6O2/c1-21-15-14(16(25)22(2)18(21)26)24(12-13-6-4-3-5-7-13)17(20-15)23-10-8-19-9-11-23/h3-7,19H,8-12H2,1-2H3/p+1