Synthesis and Characterization of a Macrocyclic Near-Infrared Optical Scaffold

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Abstract
Macrocyclization of a bioactive peptide with a bifunctional near-infrared fluorescent optical probe gives a compound that retained the receptor binding affinity of the peptide and the photophysical properties of the optical probe. The robust nature of the new compound provides a structural framework for optimizing the activity of bioactive molecules and for monitoring chemical or biological processes in vivo and in vitro by near-infrared optical methods.