InChI=1S/C15H12Cl2N2O4S/c16-12-3-1-10(8-13(12)17)18-15(20)19-24(21,22)11-2-4-14-9(7-11)5-6-23-14/h1-4,7-8H,5-6H2,(H2,18,19,20)