InChI=1S/C25H28O9/c26-17(14-19(27)16-7-2-1-3-8-16)9-5-4-6-15-10-12-18(13-11-15)33-25-22(30)20(28)21(29)23(34-25)24(31)32/h1-3,5,7-13,19-23,25,27-30H,4,6,14H2,(H,31,32)/b9-5+