InChI=1S/C22H26N4O2/c23-21(24)18-11-8-17(9-12-18)15-25-22(28)19-7-4-14-26(19)20(27)13-10-16-5-2-1-3-6-16/h1-3,5-6,8-9,11-12,19H,4,7,10,13-15H2,(H3,23,24)(H,25,28)/t19-/m0/s1