InChI=1/C19H16N4O4/c1-12(24)21-18-9-23(10-20-18)15-5-2-13(3-6-15)19(25)22-14-4-7-16-17(8-14)27-11-26-16/h2-10H,11H2,1H3,(H,21,24)(H,22,25)/f/h21-22H 43367950D5D82D2C