InChI=1/C20H16N4O/c1-13(15-7-6-14-4-2-3-5-16(14)10-15)23-24-20(25)17-8-9-18-19(11-17)22-12-21-18/h2-12H,1H3,(H,21,22)(H,24,25)/b23-13-/f/h21,24H 5D539F0909A2E7C3