InChI=1S/C23H22O9/c1-12(24)29-11-18-20(13-5-7-15(26-2)16(9-13)27-3)32-22-17(28-4)10-14-6-8-19(25)31-21(14)23(22)30-18/h5-10,18,20H,11H2,1-4H3