InChI=1S/C28H24N2O2/c1-16-13-20-18-9-6-8-12-22(18)30(28(20)24(14-16)32-4)27-17(2)15-23(31-3)26-25(27)19-10-5-7-11-21(19)29-26/h5-15,29H,1-4H3