InChI=1S/C21H20O10/c22-7-15-18(26)19(27)20(28)21(31-15)30-14-6-11(24)5-13-16(14)17(25)12(8-29-13)9-1-3-10(23)4-2-9/h1-6,8,15,18-24,26-28H,7H2/t15-,18-,19+,20-,21-/m1/s1