InChI=1/C16H20N4O/c1-11-16(12(2)19-18-11)17-15(21)10-20-9-5-7-13-6-3-4-8-14(13)20/h3-4,6,8H,5,7,9-10H2,1-2H3,(H,17,21)(H,18,19)/f/h17-18H 9E17662727139D0A