InChI=1S/C26H20N2O9/c29-19-11-3-1-2-4-15(11)27-17-9-14-18(8-13(17)19)28-16-6-5-10(7-12(16)20(14)30)36-26-23(33)21(31)22(32)24(37-26)25(34)35/h1-9,21-24,26,31-33H,(H,27,29)(H,28,30)(H,34,35)