The present invention discloses a responsive full-
cyanine small molecule near-
infrared fluorescent probe targeting MOR, its synthesis method and application. The fluorescent probe is a compound with the
structural formula shown in (I) or a pharmaceutically acceptable salt thereof. The fluorescent probe constructed by the present invention is based on a full-
cyanine fluorescent dye and the MOR
antagonist naltrexone, with low synthesis cost and simple operation. It can specifically identify MOR and produce a considerable fluorescent
signal after binding to the hydrophobic region of MOR, avoiding washing operations and detecting MOR with high sensitivity. The fluorescent probe described in the present invention has a stable skeleton structure and is suitable for real-time monitoring of MOR on the
cell membrane of living cells under a
confocal microscope. The fluorescent probe described in the present invention plays an important role in the study of the binding
kinetics of MOR and various ligands, and can also be used for screening ligands that specifically bind to MOR receptors. #imgabs0#