InChI=1S/C23H28N4O/c1-17(18-6-3-2-4-7-18)26-23(28)19-9-13-27(14-10-19)15-11-20-16-25-22-21(20)8-5-12-24-22/h2-8,12,16-17,19H,9-11,13-15H2,1H3,(H,24,25)(H,26,28)