InChI=1/C13H14N4O4/c1-13(2,3)12-14-15-16-17(12)9-5-7(10(18)19)4-8(6-9)11(20)21/h4-6H,1-3H3,(H,18,19)(H,20,21)/p-2/fC13H12N4O4/q-2 9033D2F16DE0BB4C