InChI=1S/C22H31NO7S/c1-17(2)15-23-22(24)20(30-31(25,26)27)11-9-7-5-3-4-6-8-10-18-12-13-19-21(14-18)29-16-28-19/h7-10,12-14,17,20H,3-6,11,15-16H2,1-2H3,(H,23,24)(H,25,26,27)/b9-7+,10-8+