InChI=1S/C24H28O9/c1-3-17(18(12(2)25)14-4-8-15(26)9-5-14)13-6-10-16(11-7-13)32-24-21(29)19(27)20(28)22(33-24)23(30)31/h4-12,19-22,24-29H,3H2,1-2H3,(H,30,31)/b18-17-