InChI=1S/C25H28O9/c26-17(4-2-1-3-15-5-11-18(27)12-6-15)10-7-16-8-13-19(14-9-16)33-25-22(30)20(28)21(29)23(34-25)24(31)32/h2,4-6,8-9,11-14,20-23,25,27-30H,1,3,7,10H2,(H,31,32)/b4-2+