InChI=1/C15H20N4O2/c20-14(19-12-3-1-2-8-16-15(12)21)10-4-7-13(17-9-10)18-11-5-6-11/h4,7,9,11-12H,1-3,5-6,8H2,(H,16,21)(H,17,18)(H,19,20)/t12-/m1/s1/f/h16,18-19H 5F1B8AD8A8BF0C31