This compound is primarily used in peptide synthesis, where it serves as a protected amino acid building block. The Fmoc (fluorenylmethyloxycarbonyl) group protects the amine functionality, while the Boc (tert-butyloxycarbonyl) group safeguards the side chain of lysine. The FmocHmb (fluorenylmethyloxycarbonyl-hydroxymethylbenzoic acid) group provides additional protection, enhancing the stability of the peptide chain during synthesis. This chemical is particularly useful in solid-phase peptide synthesis (SPPS) to prevent unwanted side reactions and ensure the correct sequence of amino acids. Its application is critical in the production of complex peptides for research, pharmaceuticals, and biotechnology, where precise and efficient synthesis is essential.