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 modifications, making it valuable in the development of enzyme inhibitors and pharmaceutical intermediates. The fluorenylmethyloxycarbonyl (Fmoc) group provides temporary protection of the amine functionality, enabling controlled stepwise assembly of peptides in solid-phase synthesis. Commonly employed in the production of protease inhibitors and other therapeutics requiring stereochemical precision.