Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other biologically active molecules. Its aldehyde functional group allows for further derivatization, such as reductive amination or condensation reactions, enabling the construction of complex heterocyclic systems. Commonly employed in medicinal chemistry for structure-activity relationship studies due to its rigid scaffold and ability to mimic peptide-like structures. Also utilized in the preparation of fluorescent probes and labeled compounds for biochemical assays.