InChI=1S/C24H28O9/c1-2-17(18(11-12-25)14-3-7-15(26)8-4-14)13-5-9-16(10-6-13)32-24-21(29)19(27)20(28)22(33-24)23(30)31/h3-10,19-22,24-29H,2,11-12H2,1H3,(H,30,31)/b18-17-