InChI=1S/C20H16N2O3/c1-25-19-10-13(5-7-18(19)23)12-4-6-15-16(11-14-3-2-8-21-14)20(24)22-17(15)9-12/h2-11,21,23H,1H3,(H,22,24)/b16-11-