InChI=1S/C19H16O13S/c20-12-5-10(31-17(19(25)26)16(22)18(23)24)6-13-14(12)15(21)11(7-30-13)8-2-1-3-9(4-8)32-33(27,28)29/h1-6,11,16-17,20,22H,7H2,(H,23,24)(H,25,26)(H,27,28,29)