InChI=1S/C21H27NO7S/c1-2-13-22-14-17(29-30(25,26)27)15-28-21-10-6-4-8-18(21)20(24)12-11-16-7-3-5-9-19(16)23/h3-10,17,22-23H,2,11-15H2,1H3,(H,25,26,27)