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