InChI=1S/C21H14O17S/c22-9-2-7(3-10(23)15(9)27)20(31)37-18-14(26)8(5-11(24)16(18)28)21(32)36-13-4-6(19(29)30)1-12(25)17(13)38-39(33,34)35/h1-5,22-28H,(H,29,30)(H,33,34,35)