InChI=1/C16H20N4O/c1-15(2)8-10(16(3,4)20-15)14-18-11-7-5-6-9(13(17)21)12(11)19-14/h5-8,20H,1-4H3,(H2,17,21)(H,18,19)/f/h18H,17H2 B83A273DA932053A