InChI=1S/C26H20N2O9/c29-19-10-4-1-2-5-13(10)27-15-9-12-16(8-11(15)19)28-14-6-3-7-17(18(14)20(12)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)