InChI=1S/C18H13N3O3/c22-16-14(10-11-6-2-1-3-7-11)21-15(17(23)20-16)19-13-9-5-4-8-12(13)18(21)24/h1-9,14H,10H2,(H,20,22,23)/t14-/m0/s1