InChI=1S/C12H16Cl2O7S/c1-20-10-4-7(2-8(15)5-10)3-9(16)6-11(12(13)14)21-22(17,18)19/h2,4-5,9,11-12,15-16H,3,6H2,1H3,(H,17,18,19)