InChI=1S/C26H16N2O4/c1-11-17(25(31)21-19(23(11)29)13-7-3-5-9-15(13)27-21)18-12(2)24(30)20-14-8-4-6-10-16(14)28-22(20)26(18)32/h3-10,27-28H,1-2H3