InChI=1S/C27H20N2O3/c1-13-12-19(32-3)24-22(15-8-4-6-10-17(15)28-24)20(13)21-14(2)26(30)23-16-9-5-7-11-18(16)29-25(23)27(21)31/h4-12,28-29H,1-3H3