InChI=1S/C20H20N6O/c21-12-13-5-7-14(8-6-13)23-20(27)24-15-9-10-22-18(11-15)19-25-16-3-1-2-4-17(16)26-19/h1-8,15,18,22H,9-11H2,(H,25,26)(H2,23,24,27)/t15-,18-/m1/s1