InChI=1S/C20H24N2O7S2/c1-21(2)10-11-22-16-9-6-14(23)12-17(16)30-19(13-4-7-15(28-3)8-5-13)18(20(22)24)29-31(25,26)27/h4-9,12,18-19,23H,10-11H2,1-3H3,(H,25,26,27)