InChI=1S/C21H18O12S/c1-8-17(25)19(27)21(33-34(28,29)30)20(31-8)16-12(24)7-14-15(18(16)26)11(23)6-13(32-14)9-2-4-10(22)5-3-9/h2-8,19-22,24,26-27H,1H3,(H,28,29,30)