InChI=1S/C20H23N5O/c1-20(2,3)17-13-18(23-19(26)22-15-9-5-4-6-10-15)25(24-17)16-11-7-8-14(21)12-16/h4-13H,21H2,1-3H3,(H2,22,23,26)