InChI=1S/C22H31NO7S/c1-18(16-30-31(25,26)27)15-23-22(24)11-9-7-5-3-2-4-6-8-10-19-12-13-20-21(14-19)29-17-28-20/h5,7-8,10,12-14,18H,2-4,6,9,11,15-17H2,1H3,(H,23,24)(H,25,26,27)/b7-5+,10-8+