InChI=1S/C20H22N6O/c1-13-10-14(6-8-21)11-15(12-27)19(13)25-18-7-9-23-20(26-18)24-17-4-2-16(22)3-5-17/h2-11,27H,12,21-22H2,1H3,(H2,23,24,25,26)/b8-6-