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. Author manuscript; available in PMC: 2009 Feb 15.
Published in final edited form as: Bioorg Med Chem. 2007 Nov 12;16(4):1775–1783. doi: 10.1016/j.bmc.2007.11.019

Figure 2.

Figure 2

Absorbance spectra of compounds 1 (A, B) and 3 (C, D) in the presence of increasing concentrations of Mg2+ (A, C) or Cu2+ (B, D). Arrows denote the changes in absorbance with increasing metal ion concentrations.