InChI=1/C16H13N3O4/c1-7-11-12(8-2-4-9(5-3-8)15(20)21)13-10(6-23-16(13)22)17-14(11)19-18-7/h2-5,12H,6H2,1H3,(H3,17,18,19,20,21,22)/p-2/t12-/m1/s1/fC16H11N3O4/h18H/q-2 7D1F40A03D9F4915