InChI=1S/C25H26N2O2/c1-3-7-21(8-4-1)25(22-9-5-2-6-10-22)27-15-13-26(14-16-27)18-20-11-12-23-24(17-20)29-19-28-23/h1-12,17,25H,13-16,18-19H2