InChI=1S/C21H22O14S/c1-7-15(25)17(27)18(28)21(32-7)34-20-16(26)14-11(24)5-9(22)6-13(14)33-19(20)8-2-3-10(23)12(4-8)35-36(29,30)31/h2-7,15,17-25,27-28H,1H3,(H,29,30,31)