InChI=1S/C17H20O9S/c1-17(2,20)13-7-10-12(25-13)8-11(18)15-9(6-14(19)26-16(10)15)4-3-5-24-27(21,22)23/h6,8,13,18,20H,3-5,7H2,1-2H3,(H,21,22,23)