InChI=1S/C20H19O13S/c21-9-4-12(23)10-6-15(19(31-14(10)5-9)8-1-2-11(22)13(24)3-8)32-20-18(26)17(25)16(7-30-20)33-34(27,28)29/h1-6,16-18,20-26H,7H2,(H,27,28,29)