InChI=1S/C11H11Cl4NO9/c12-7(13)10(8(22)16-9(23)11(10,14)15)25-6-3(19)1(17)2(18)4(24-6)5(20)21/h1-4,6-7,17-19H,(H,20,21)(H,16,22,23)