Used in peptide synthesis as a protected amino acid derivative, particularly in the preparation of structurally modified peptides. Its N-methyl and ester-protected functional groups enhance lipophilicity and resistance to enzymatic degradation, making it valuable in medicinal chemistry for designing bioactive peptides with improved metabolic stability. Commonly employed in solid-phase and solution-phase synthesis to introduce N-methylated amino acid residues that can influence peptide conformation and biological activity.