Used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS), as a building block for introducing lysine residues with dual Fmoc protection. It ensures selective deprotection and coupling during the synthesis of complex peptides. Commonly applied in the production of peptides for research, pharmaceuticals, and biotechnology, where precise control over amino acid incorporation is critical. Its dual Fmoc groups provide enhanced stability and efficiency in multi-step peptide assembly processes.