InChI=1S/C20H24O9/c21-9-16-17(25)18(26)19(27)20(29-16)28-15-6-4-12(22)8-11(15)3-1-10-2-5-13(23)14(24)7-10/h2,4-8,16-27H,1,3,9H2/t16-,17-,18+,19-,20-/m1/s1