InChI=1S/C20H27NO7S/c1-15(2)13-21-20(22)18(28-29(23,24)25)9-7-5-3-4-6-8-16-10-11-17-19(12-16)27-14-26-17/h5-8,10-12,15,18H,3-4,9,13-14H2,1-2H3,(H,21,22)(H,23,24,25)/b7-5+,8-6+