Used as a chiral building block in the synthesis of peptide-based pharmaceuticals and protease inhibitors. Its hydrazide functionality allows for selective coupling reactions, making it valuable in solid-phase peptide synthesis. Commonly employed in the preparation of enzyme inhibitors, particularly for targets involving serine or cysteine proteases. Also utilized in the development of bioconjugation reagents and prodrug strategies due to its stability under physiological conditions and controlled cleavage properties.