InChI=1/C11H9N4O4/c1-14-5-12-10(15(16)17)11(14)13-7-2-3-8-9(4-7)19-6-18-8/h2-5H,6H2,1H3/q-1/p+1/fC11H10N4O4/h13H/q 4B1189ED85687CE0