InChI=1S/C22H23N5O/c28-26-21-4-2-16-13-17(1-3-19(16)21)20-14-27(18-7-11-24-12-8-18)25-22(20)15-5-9-23-10-6-15/h1,3,5-6,9-10,13-14,18,24,28H,2,4,7-8,11-12H2/b26-21+