InChI=1S/C21H18O17S/c22-6-2-1-5(3-7(6)23)15-18(38-39(32,33)34)11(26)10-8(24)4-9(25)16(17(10)35-15)36-21-14(29)12(27)13(28)19(37-21)20(30)31/h1-4,12-14,19,21-25,27-29H,(H,30,31)(H,32,33,34)