InChI=1S/C24H18N2O3/c1-29-16-9-7-15(8-10-16)25-24(28)20-12-14-6-11-18-17-4-2-3-5-21(17)26-23(18)19(14)13-22(20)27/h2-13,26-27H,1H3,(H,25,28)