This compound is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected amino acid derivative of homoarginine, where the Fmoc (9-fluorenylmethoxycarbonyl) group protects the amino group, and the Pbf (2,2,4,6,7-pentamethyldihydrobenzofuran-5-sulfonyl) group protects the guanidine side chain of homoarginine. This protection ensures selective reactions during peptide chain assembly, preventing unwanted side reactions. After the peptide chain is constructed, the Fmoc and Pbf groups can be removed under specific conditions, revealing the free amino and guanidine groups. This makes it a crucial reagent for synthesizing peptides containing homoarginine residues, which are used in biologically active peptides and proteins. Its application is essential in pharmaceutical research, drug development, and the production of peptide-based therapeutics.