Used in peptide synthesis as a protected amino acid derivative, particularly in the preparation of complex bioactive peptides. The benzyloxycarbonyl (Cbz) group serves as an amine protecting group, allowing selective deprotection and coupling in solid-phase or solution-phase peptide assembly. The stereochemistry (S-configuration) ensures proper chiral integrity in the final peptide product, which is critical for biological activity. Commonly employed in the synthesis of protease inhibitors and other pharmaceutical agents where precise amino acid sequence and configuration are required. Also utilized as an intermediate in the production of antibiotics and enzyme inhibitors.