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