InChI=1/C18H11Cl2N3O4/c19-10-2-4-12(14(20)8-10)16(24)23-15-5-3-11(9-13(15)17(25)26)27-18-21-6-1-7-22-18/h1-9H,(H,23,24)(H,25,26)/p-1/fC18H10Cl2N3O4/h23H/q-1 5DA20D2C0208F674