InChI=1S/C21H13N3O3/c25-20-16-14-10-6-2-4-8-12(10)23-18(14)17-13(15(16)19(24-20)21(26)27)9-5-1-3-7-11(9)22-17/h1-8,22-25H,(H,26,27)