Used in peptide synthesis as a protected building block, particularly for introducing constrained amino acid residues into peptide chains. The Fmoc group allows for solid-phase synthesis by enabling selective deprotection under mild basic conditions, while the Amcp moiety provides structural rigidity due to its cyclopropane ring, enhancing peptide stability and influencing conformation. Commonly applied in the development of bioactive peptides, enzyme inhibitors, and pharmaceutical research where precise stereochemistry and backbone modification are critical. Its structure supports studies in structure-activity relationships (SAR) and improves metabolic stability in drug design.