InChI=1S/C21H18O16S/c22-7-2-1-6(3-11(7)37-38(31,32)33)10-4-8(23)13-9(24)5-12(14(25)18(13)34-10)35-21-17(28)15(26)16(27)19(36-21)20(29)30/h1-5,15-17,19,21-22,24-28H,(H,29,30)(H,31,32,33)