InChI=1S/C14H16N4O4/c19-13(20)11-5-9(6-12(18-11)14(21)22)1-3-15-4-2-10-7-16-8-17-10/h1,3,5,7-8,12,18H,2,4,6H2,(H,16,17)(H,19,20)(H,21,22)/b9-1-,15-3-/t12-/m0/s1