InChI=1S/C22H18O11/c23-10-5-12(24)11-7-16(28)21(32-17(11)6-10)8-1-15(27)20(30)18(4-8)33-22(31)9-2-13(25)19(29)14(26)3-9/h1-6,16,21,23-30H,7H2/t16-,21+/m0/s1