Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and antiviral agents. It serves as a building block in medicinal chemistry due to its ability to mimic guanidine-containing structures, enhancing binding affinity to biological targets. Commonly employed in the preparation of kinase inhibitors and other bioactive molecules where a polar, basic moiety is required. Also utilized in research settings for the design of enzyme inhibitors, especially those targeting serine proteases. Its salt form improves solubility and stability, making it suitable for solution-phase reactions and biological assays.