Used in peptide synthesis as a protected D-amino acid building block, particularly in the preparation of complex peptides and peptidomimetics. The Boc (tert-butoxycarbonyl) group provides temporary protection for the amine functionality, while the benzyl (Bzl) group protects the side chain hydroxyl, allowing selective reactions at other sites. The N-methylation and D-configuration enhance metabolic stability, resist enzymatic degradation, and influence conformation, making it valuable in the design of bioactive peptides with improved pharmacokinetic properties. Commonly employed in solid-phase and solution-phase synthesis for pharmaceutical research and development.