InChI=1S/C26H46O9/c1-19(34-26-23(31)21(29)22(30)24(35-26)25(32)33)17-15-13-11-9-7-5-3-2-4-6-8-10-12-14-16-18-20(27)28/h3,5,19,21-24,26,29-31H,2,4,6-18H2,1H3,(H,27,28)(H,32,33)/b5-3+