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