Figure 1
The diamino diacetic acids, H2bped (A) and gem-H2bped (B), where bped stands for bis(2-pyridylmethyl)-1,2-diaminoethane diacetate, H2bpcd (C), and H2bppd (D), where bppd stands for bis(2-pyridylmethyl)-1,3-diaminopropane diacetate. |