InChI=1S/C12H14Cl2O8S/c1-21-10-4-6(2-7(15)5-9(17)12(13)14)3-8(16)11(10)22-23(18,19)20/h3-4,9,12,16-17H,2,5H2,1H3,(H,18,19,20)