InChI=1S/C28H32N4O/c1-17(2)16-23-19-8-7-11-22-24(19)28-13-15-32(23)26-27(28,12-14-31(26)18(3)33)20-9-5-6-10-21(20)29-25(28)30(22)4/h5-11,16,23,25-26,29H,12-15H2,1-4H3/t23-,25-,26-,27+,28+/m0/s1