InChI=1S/C21H20O10/c1-8-15(24)17(26)19(28)21(29-8)31-13-7-11(23)6-12-14(13)16(25)18(27)20(30-12)9-2-4-10(22)5-3-9/h2-8,15,17,19,21-24,26-28H,1H3/t8-,15-,17+,19+,21-/m0/s1