InChI=1S/C23H34O9/c1-3-17(31-23-20(28)18(26)19(27)21(32-23)22(29)30)14-10-9-13-16(25)12-8-6-4-5-7-11-15(2)24/h3,8,10,12,14-21,23-28H,1,4-7,11H2,2H3,(H,29,30)/b12-8+,14-10+