InChI=1S/C21H20O11/c22-6-12-15(27)16(28)18(30)21(31-12)13-10(24)4-2-8-14(26)17(29)19(32-20(8)13)7-1-3-9(23)11(25)5-7/h1-5,12,15-16,18,21-25,27-30H,6H2/t12-,15-,16+,18-,21+/m1/s1