InChI=1S/C22H24O9/c1-29-19-13(9-5-8-12-6-3-2-4-7-12)10-11-14(15(19)23)30-22-18(26)16(24)17(25)20(31-22)21(27)28/h2-8,10-11,16-18,20,22-26H,9H2,1H3,(H,27,28)/b8-5+