InChI=1S/C21H20O16S/c22-5-11-13(27)15(29)16(30)21(34-11)36-18-10(26)4-9(25)12-14(28)20(37-38(31,32)33)17(35-19(12)18)6-1-2-7(23)8(24)3-6/h1-4,11,13,15-16,21-27,29-30H,5H2,(H,31,32,33)