InChI=1S/C25H28O9/c26-17(11-8-16-5-3-7-18(27)14-16)6-2-1-4-15-9-12-19(13-10-15)33-25-22(30)20(28)21(29)23(34-25)24(31)32/h2-3,5-7,9-10,12-14,20-23,25,27-30H,1,4,8,11H2,(H,31,32)/b6-2+