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