InChI=1S/C20H15N9O/c1-12(26-18-15(10-22)17(23)24-11-25-18)19-27-28-8-7-13(9-21)16(28)20(30)29(19)14-5-3-2-4-6-14/h2-8,11-12H,1H3,(H3,23,24,25,26)/t12-/m0/s1