InChI=1/C19H18N4O4/c24-18(11-4-13-2-1-3-17(12-13)23(26)27)20-14-5-7-15(8-6-14)21-19(25)22-16-9-10-16/h1-8,11-12,16H,9-10H2,(H,20,24)(H2,21,22,25)/b11-4+/f/h20-22H 5614C2F839102AC1