InChI=1S/C20H18N4O6/c1-2-30-19-16-14(10-4-3-9(6-21)5-13(10)26)15(18(22)27)12(8-25)24-17(16)11(7-23-19)20(28)29/h3-5,7,14,24-26H,2,8H2,1H3,(H2,22,27)(H,28,29)/t14-/m1/s1