InChI=1S/C17H16O9S/c1-24-13-7-12(18)14-15(19)10(8-25-17(14)16(13)20)5-9-3-2-4-11(6-9)26-27(21,22)23/h2-4,6-7,10,18,20H,5,8H2,1H3,(H,21,22,23)