Used in peptide synthesis as a protected amino acid derivative, particularly in the preparation of modified peptides with specific structural features. The double bond in the side chain allows for further functionalization via selective chemical reactions, such as cross-metathesis or hydrogenation, enabling the introduction of labels or cyclic structures. Commonly employed in research settings to develop bioactive peptides, enzyme inhibitors, or probes for biochemical studies. Its dihydrochloride form enhances solubility and stability during handling and storage.