Used in neuroscience research to selectively activate designer receptors (DREADDs) in specific cell populations, enabling precise control of neuronal activity. Allows non-invasive modulation of brain circuits in vivo using systemic administration, facilitating studies on behavior, neural pathways, and disease models. Suitable for experiments requiring temporal control without implanted hardware. Stable in aqueous solutions and effective at low doses, making it ideal for long-term studies in rodents and other model organisms.