InChI=1S/C12H14Cl2O8S/c1-21-8-3-6(2-7(15)5-8)4-9(16)11(10(17)12(13)14)22-23(18,19)20/h2-3,5,10-12,15,17H,4H2,1H3,(H,18,19,20)