InChI=1S/C24H18N2O4/c1-29-23-19(15-11-25-17-9-5-3-7-13(15)17)22(28)24(30-2)20(21(23)27)16-12-26-18-10-6-4-8-14(16)18/h3-12,25-26H,1-2H3