InChI=1/C13H12ClN3O4/c1-2-16-7-9(17(20)21)6-11(16)13(19)15-8-3-4-10(14)12(18)5-8/h3-7,18H,2H2,1H3,(H,15,19)/f/h15H 7E2281A1E0FFAAEA