InChI=1S/C21H20O12/c22-6-13-15(26)17(28)19(30)21(33-13)32-12-5-8(23)4-11-14(12)16(27)18(29)20(31-11)7-1-2-9(24)10(25)3-7/h1-5,13,15,17,19,21-26,28-30H,6H2/t13-,15-,17+,19-,21-/m1/s1