Used in peptide synthesis, particularly in the development of bioactive peptides and pharmaceutical research. Its Fmoc group enables solid-phase peptide synthesis by allowing stepwise assembly with controlled deprotection under mild basic conditions. The thienyl side chain provides a unique aromatic moiety that can influence peptide conformation, stability, and receptor binding properties. Being a D-amino acid derivative, it introduces structural resistance to enzymatic degradation, making peptides more stable in biological environments. Commonly applied in designing peptide-based drugs, probes, and biomaterials where enhanced metabolic stability and specific stereochemistry are required.