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