InChI=1S/C22H22O9/c1-10-17(25)18(26)19(27)22(29-10)31-21-16-12(23)8-14(11-6-4-3-5-7-11)30-15(16)9-13(24)20(21)28-2/h3-10,17-19,22,24-27H,1-2H3