InChI=1S/C19H14O13S/c20-9-3-1-8(2-4-9)11-7-30-13-6-10(5-12(21)14(13)15(11)22)31-16(18(23)24)17(19(25)26)32-33(27,28)29/h1-7,16-17,20-21H,(H,23,24)(H,25,26)(H,27,28,29)