InChI=1S/C21H16N4O5/c22-19-5-4-16-18(24-19)10-17(23-16)15-7-11(8-20(26)27)6-14(21(15)28)12-2-1-3-13(9-12)25(29)30/h1-7,9-10,23,28H,8H2,(H2,22,24)(H,26,27)