InChI=1S/C24H18N2O5/c1-30-20-19(15-11-25-17-9-5-3-7-13(15)17)21(27)24(22(20)28,23(29)31-2)16-12-26-18-10-6-4-8-14(16)18/h3-12,25-26H,1-2H3