InChI=1/C21H24N4O/c1-12(2)20-19-15(14-5-3-4-6-17(14)23-19)9-10-25(20)21(26)16-11-22-24-18(16)13-7-8-13/h3-6,11-13,16,20,23H,7-10H2,1-2H3/t16-,20-/m0/s1 4E3E7CB797833E5E