InChI=1S/C20H20O11/c1-8(22)29-19-15(7-21)31-20(18(19)28)30-14-6-12(25)5-13(26)16(14)17(27)9-2-10(23)4-11(24)3-9/h2-6,15,18-21,23-26,28H,7H2,1H3/t15-,18+,19-,20-/m0/s1