Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and antiviral agents. It serves as a building block in medicinal chemistry due to its ability to enhance binding affinity and solubility in drug molecules. Commonly employed in the preparation of guanidine-containing compounds, which are important for their biological activity in treating various diseases, including cancer and viral infections. Also utilized in research settings for modifying peptide structures and improving metabolic stability.