This chemical is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) methods. It serves as a protected amino acid derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group acts as a temporary protecting group for the amino group during the synthesis process. The 3-benzothienyl side chain introduces a unique aromatic structure, which can be beneficial in designing peptides with specific biological activities or binding properties. It is commonly employed in the development of peptide-based drugs, research peptides, and biochemical studies where the incorporation of non-natural amino acids is required to enhance stability, activity, or selectivity. Its application is crucial in the synthesis of complex peptides for pharmaceutical and biotechnology industries.