Used in pharmaceutical synthesis as an intermediate for developing bioactive molecules, particularly in the production of receptor agonists and antagonists. Commonly employed in the development of central nervous system (CNS) targeting drugs due to its ability to cross the blood-brain barrier. Also utilized in the preparation of fluorescent probes and labeled compounds for biochemical assays and imaging studies. Its amide and amine functional groups allow for easy conjugation in peptide-based drug design and medicinal chemistry research.