InChI=1S/C19H21N5O/c1-2-3-8-18(25)20-13-14-9-11-15(12-10-14)16-6-4-5-7-17(16)19-21-23-24-22-19/h4-7,9-12H,2-3,8,13H2,1H3,(H,20,25)(H,21,22,23,24)