InChI=1S/C19H14O13S/c20-13-9(8-4-2-1-3-5-8)7-30-10-6-11(14(21)15(22)12(10)13)31-16(18(23)24)17(19(25)26)32-33(27,28)29/h1-7,16-17,21-22H,(H,23,24)(H,25,26)(H,27,28,29)