InChI=1S/C20H20N2O11.Fe/c23-7-11(21-17(28)9-3-1-5-13(24)15(9)26)20(32)33-8-12(19(30)31)22-18(29)10-4-2-6-14(25)16(10)27;/h1-6,11-12,23-27H,7-8H2,(H,21,28)(H,22,29)(H,30,31);/q;+3/p-5/t11-,12-;/m0./s1