InChI=1S/C20H18O12S/c21-9-6-10(8-4-2-1-3-5-8)31-19-12(9)15(23)17(25)16(24)13(19)20-18(26)14(22)11(7-30-20)32-33(27,28)29/h1-6,11,14,18,20,22-26H,7H2,(H,27,28,29)