InChI=1/C12H9N5O4/c1-6-4-16(5-13-6)9-2-7-8(3-10(9)17(20)21)15-12(19)11(18)14-7/h2-5H,1H3,(H,14,18)(H,15,19)/p-1/fC12H8N5O4/h14H/q-1 CA897A178AD21278