InChI=1S/C20H22N6O2/c21-7-5-13-9-14(11-27)19(15(10-13)12-28)25-18-6-8-23-20(26-18)24-17-3-1-16(22)2-4-17/h1-10,27-28H,11-12,21-22H2,(H2,23,24,25,26)/b7-5-