InChI=1/C13H16N4O4/c1-9-2-3-10(8-11(9)17(20)21)15-12(18)13(19)16-6-4-14-5-7-16/h2-3,8,14H,4-7H2,1H3,(H,15,18)/p+1/fC13H17N4O4/h14-15H/q+1 9BE545FB15111FD7