InChI=1S/C17H14O10S/c1-25-17-14(21)12-13(20)11(19)6-9(7-26-28(22,23)24)15(12)27-16(17)8-2-4-10(18)5-3-8/h2-6,18-20H,7H2,1H3,(H,22,23,24)