InChI=1/C15H11N3O4/c19-14(9-3-4-11-12(8-9)21-7-6-20-11)17-13-10-2-1-5-16-15(10)22-18-13/h1-5,8H,6-7H2,(H,17,18,19)/f/h17H 0B468300A83C3BB4