Used in solid-phase peptide synthesis to incorporate a modified ornithine residue with orthogonal protection. The Fmoc group allows for mild base deprotection, while the Boc group on the side chain ensures stability during chain elongation. The alpha-methyl modification enhances metabolic stability and induces conformational constraints in the peptide backbone, making it valuable in designing peptidomimetics for drug development. Commonly applied in creating enzyme-resistant peptides and studying structure-activity relationships in bioactive peptides.