InChI=1/C19H26N4O2/c1-13-16(15-5-3-4-6-17(15)21-13)11-18(24)22-14-7-9-23(10-8-14)12-19(25)20-2/h3-6,14,21H,7-12H2,1-2H3,(H,20,25)(H,22,24)/f/h20,22H 696BF8ADE4B04126