InChI=1S/C21H20O11/c22-7-13-15(25)17(27)19(29)21(32-13)31-12-6-10(24)5-11-14(12)16(26)18(28)20(30-11)8-1-3-9(23)4-2-8/h1-6,13,15,17,19,21-25,27-29H,7H2/t13-,15-,17+,19-,21-/m1/s1