InChI=1/C15H20N4O4/c1-9-4-5-12(6-10(9)2)19-8-11(7-13(19)20)16-14(21)17-18-15(22)23-3/h4-6,11H,7-8H2,1-3H3,(H,18,22)(H2,16,17,21)/t11-/m0/s1/f/h16-18H 53811E44E041B1C1