InChI=1S/C17H20O8S/c1-9(2)4-5-12-13(18)8-14-16(17(12)20)11(7-15(19)24-14)6-10(3)25-26(21,22)23/h4,7-8,10,18,20H,5-6H2,1-3H3,(H,21,22,23)