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