InChI=1S/C17H14O10S/c1-7-5-10(19)13(20)12-14(21)17(25-2)16(26-15(7)12)8-3-4-9(18)11(6-8)27-28(22,23)24/h3-6,18-20H,1-2H3,(H,22,23,24)