InChI=1S/C19H18N2O11/c22-10-4-3-9(15(26)20-10)21-16(27)7-2-1-6(5-8(7)17(21)28)31-19-13(25)11(23)12(24)14(32-19)18(29)30/h1-2,5,9,11-14,19,23-25H,3-4H2,(H,29,30)(H,20,22,26)/t9?,11-,12-,13+,14-,19?/m0/s1