InChI=1/C19H18N4O4/c1-11-5-3-4-6-15(11)17-16(12(2)20-19(25)22-17)18(24)21-13-7-9-14(10-8-13)23(26)27/h3-10,17H,1-2H3,(H,21,24)(H2,20,22,25)/t17-/m1/s1/f/h20-22H ACEC2A8F2C687CAF