InChI=1/C16H20N4O2/c1-20-14-5-3-2-4-13(14)17-15(20)19-18-12-6-8-16(9-7-12)21-10-11-22-16/h2-5H,6-11H2,1H3,(H,17,19)/f/h19H 4BF2B93E97CDE233