InChI=1S/C17H16O10S/c1-7-11(18)14(21)12(19)10-13(20)17(25-2)16(26-15(7)10)8-3-5-9(6-4-8)27-28(22,23)24/h3-6,16-19,21H,1-2H3,(H,22,23,24)