1 YOK [[2,2'-[4-carboxyethyl-1,2-phenylenebis(nitrilomethylidyne)]bis[phenolato]](2-)-N,N',O,O']-iron 1.000 2 YOM 2,2'-[1,2-phenylenebis(nitrilomethylidyne)]bis[phenolato]](2-)-N,N',O,O']-iron 0.833 3 YOL [[2,2'-[4-carboxy-1,2-phenylenebis(nitrilomethylidyne)]bis[phenolato]](2-)-N,N',O,O']-iron 0.812