InChI=1S/C24H17ClN4O4/c1-14-6-2-5-9-19(14)26-24(31)18-12-15-7-3-4-8-17(15)22(23(18)30)28-27-20-11-10-16(25)13-21(20)29(32)33/h2-13,27H,1H3,(H,26,31)/b28-22-