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. 2015 Jun 17;137(28):9108–9116. doi: 10.1021/jacs.5b04509

Figure 1.

Figure 1

Structure of agents investigated in vitro. The presence of the IR-783 dye moiety in complexes 1 and 2 increases cellular uptake and introduces the capacity to image using optical imaging. Complex 1 utilizes a PEG linker to increase water solubility and increase the distance between the Gd(III) and NIR moieties.