InChI=1S/C20H16N2O2.Fe/c23-19-11-5-1-7-15(19)13-21-17-9-3-4-10-18(17)22-14-16-8-2-6-12-20(16)24;/h1-14,23-24H;/q;+4/p-2/b21-13+,22-14+;