InChI=1S/C17H20O8S/c1-4-14(25-26(21,22)23)11-7-15(20)24-17-10(6-5-9(2)3)12(18)8-13(19)16(11)17/h5,7-8,14,18-19H,4,6H2,1-3H3,(H,21,22,23)