InChI=1S/C16H16O9S/c1-24-15-11(6-7-12(18)16(15)25-26(21,22)23)14(20)8-13(19)9-2-4-10(17)5-3-9/h2-7,14,17-18,20H,8H2,1H3,(H,21,22,23)