InChI=1S/C25H28O8/c26-18(14-13-16-7-2-1-3-8-16)11-5-4-9-17-10-6-12-19(15-17)32-25-22(29)20(27)21(28)23(33-25)24(30)31/h1-4,6-10,12,15,20-23,25,27-29H,5,11,13-14H2,(H,30,31)/b9-4+