Used primarily in peptide synthesis, it serves as a protecting group for cysteine residues. The FMOC group ensures selective deprotection during the synthesis process, while the BZL (benzyl) group protects the thiol side chain of cysteine, preventing unwanted reactions. This compound is particularly valuable in solid-phase peptide synthesis, enabling the production of complex peptides with high precision. Its application is crucial in the development of pharmaceuticals, bioactive peptides, and research involving protein engineering.