InChI=1S/C22H22N4O/c1-14(9-10-20-15(2)25-22(24)26-21(20)23)17-11-18(13-19(12-17)27-3)16-7-5-4-6-8-16/h4-8,11-14H,1-3H3,(H4,23,24,25,26)/t14-/m0/s1