InChI=1S/C21H18N4O5/c1-4-30-20-17-16(12-6-5-11(8-22)7-14(12)29-3)15(19(23)26)10(2)25-18(17)13(9-24-20)21(27)28/h5-7,9H,4H2,1-3H3,(H2,23,26)(H,27,28)