InChI=1S/C21H20N4O2/c26-12-16(27)11-22-20-18-17(14-7-3-1-4-8-14)19(15-9-5-2-6-10-15)25-21(18)24-13-23-20/h1-10,13,16,26-27H,11-12H2,(H2,22,23,24,25)/t16-/m1/s1