InChI=1S/C17H14O9S/c1-24-17-14(20)12-13(19)11(18)7-10(8-25-27(21,22)23)15(12)26-16(17)9-5-3-2-4-6-9/h2-7,18-19H,8H2,1H3,(H,21,22,23)