Fluorescent beta-blocker (+/-)-RCTM-3 of type β adrenergic receptors corresponding to the chemical structure of propranolol, with the 1-naphthol ring replaced by 9-hydroxy-4-methoxyacridine. The resulting compound is a weak base with high lipophilicity and a structure that makes it strongly fluorescent and chemically stable.
The compound exhibits a very high quantum light efficiency.
It is a highly efficient secretory organelle marker for use in standard epifluorescence microscopy.
Its enormous quantum efficiency makes it possible to obtain high-quality images with the lasers commonly used in confocal or vanishing-wave microscopy.