InChI=1/C16H12N4O4/c1-9-16(21)19-13-7-11(3-5-15(13)24-9)18-12-4-2-10(8-17)6-14(12)20(22)23/h2-7,9,18H,1H3,(H,19,21)/t9-/m1/s1/f/h19H 6D126E7853C2F3D4