InChI=1S/C17H20O9S/c1-3-4-9-5-14(19)26-16-10-6-13(17(2,20)8-24-27(21,22)23)25-12(10)7-11(18)15(9)16/h5,7,13,18,20H,3-4,6,8H2,1-2H3,(H,21,22,23)