Used in peptide synthesis as a protected building block, enabling selective coupling reactions without interference from the amine group. The Fmoc group provides base-labile protection, allowing for orthogonal deprotection in solid-phase synthesis. The phenolic hydroxyl group can be further functionalized for conjugation or used to anchor the molecule to solid supports. Commonly employed in the preparation of bioconjugates, drug delivery systems, and labeled peptides where controlled release or site-specific modification is required. Its structure supports the development of enzyme substrates and probes in biochemical assays.