InChI=1S/C20H18O13S/c21-10-5-13(8-2-1-3-9(4-8)33-34(27,28)29)31-14-6-11(22)19(17(25)15(10)14)32-20-18(26)16(24)12(23)7-30-20/h1-6,12,16,18,20,22-26H,7H2,(H,27,28,29)