InChI=1S/C25H34O9/c1-4-6-7-8-9-10-11-15-19(16-13-12-14-18(5-2)32-17(3)26)33-25-22(29)20(27)21(28)23(34-25)24(30)31/h5,11,15,18-23,25,27-29H,2,4,6-10H2,1,3H3,(H,30,31)/b15-11+