InChI=1S/C21H20O10/c22-8-14-16(25)17(26)19(28)21(31-14)29-11-4-1-9(2-5-11)20-18(27)15(24)12-6-3-10(23)7-13(12)30-20/h1-7,14,16-17,19,21-23,25-28H,8H2/t14-,16-,17+,19-,21-/m1/s1