This compound is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected cysteine derivative, where the Fmoc group protects the amino group and the Mbzl (4-methylbenzyl) group protects the thiol side chain of cysteine. This protection is crucial to prevent unwanted reactions during peptide chain assembly. It is especially valuable in synthesizing peptides containing cysteine residues, which are prone to oxidation or disulfide bond formation. The Fmoc group can be easily removed under mild basic conditions, allowing for sequential peptide elongation, while the Mbzl group provides stability during synthesis and can be cleaved later under specific conditions. This compound is essential in producing peptides for research, pharmaceuticals, and biotechnology applications, including the development of therapeutic peptides and studies involving protein folding and disulfide bond formation.