Widely used in peptide synthesis as a protected amino acid building block. The Fmoc group provides temporary protection for the amine function, allowing selective reaction at other sites. After coupling, the Fmoc group can be easily removed under mild basic conditions, leaving the rest of the molecule intact. This makes it ideal for solid-phase peptide synthesis, especially in the production of complex peptides and proteins used in pharmaceutical research and development. Its stability and clean deprotection profile enhance synthesis efficiency and purity of final products.