InChI=1S/C21H20O10/c22-7-16-18(26)19(27)20(28)21(31-16)30-10-3-1-9(2-4-10)12-8-29-15-6-14(24)13(23)5-11(15)17(12)25/h1-6,8,16,18-24,26-28H,7H2/t16-,18-,19+,20-,21-/m1/s1