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