Fluorescent PyrAte-()-citalopram conjugates enable imaging of the serotonin transporter in living tissue.

Fluorescent labeling techniques have enabled the visualization of various biomolecules, cellular structures, and their associated physiological processes. At the same time, there remains a demand for developing novel fluorescent compounds possessing unique chemical properties for biological imaging. A recently developed class of fluorophores, termed , displays optimal brightness and large Stokes shifts that are ideal for fluorescence microscopy.