InChI=1S/C25H28O8/c26-18(9-5-4-8-16-6-2-1-3-7-16)13-10-17-11-14-19(15-12-17)32-25-22(29)20(27)21(28)23(33-25)24(30)31/h1-4,6-8,11-12,14-15,20-23,25,27-29H,5,9-10,13H2,(H,30,31)/b8-4+