InChI=1S/C21H20O13/c22-5-12-15(27)17(29)19(31)21(34-12)33-11-2-6(1-9(25)14(11)26)20-18(30)16(28)13-8(24)3-7(23)4-10(13)32-20/h1-4,12,15,17,19,21-27,29-31H,5H2/t12-,15-,17+,19-,21-/m1/s1