InChI=1S/C26H50N4O2/c1-23(2)15-21(16-24(3,4)27-23)29(19-31)13-11-9-10-12-14-30(20-32)22-17-25(5,6)28-26(7,8)18-22/h19-22,27-28H,9-18H2,1-8H3