– PRMT5-targeted fluorescent ligand-1 (Compound 7) is a fluorescent ligand specific to PRMT5 that inhibits this target with an IC50 value of 29.39 nM. It demonstrates cellular imaging activity with strong fluorescence signals in MCF-7 cells, showing an IC50 of 29 nM. Additionally, it induces apoptosis (cell death). The compound’s maximum excitation wavelength is 438 nm, and its maximum emission wavelength is 550 nm.