Used in peptide synthesis as a chiral building block for the preparation of complex bioactive molecules. Its hydroxyl and carboxylic acid functional groups allow for selective coupling reactions, making it valuable in the development of enzyme inhibitors and pharmaceutical intermediates. The Fmoc-protected amine group enables solid-phase peptide synthesis under mild base conditions, facilitating the construction of structured peptides with defined stereochemistry. Commonly applied in research settings for synthesizing protease inhibitors and other stereochemically sensitive therapeutics.