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