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