This compound is primarily used in solid-phase peptide synthesis (SPPS) as a protecting group for the amino acid ornithine. The Fmoc (fluorenylmethyloxycarbonyl) group protects the amine functionality, while the Mtt (4-methyltrityl) group shields the side chain of ornithine. This dual protection allows for selective deprotection during peptide chain assembly, enabling the synthesis of complex peptides with high precision. It is particularly useful in the preparation of peptides that require ornithine residues, such as those involved in biochemical research, drug development, and the study of protein interactions. The compound’s stability and compatibility with SPPS protocols make it a valuable tool in peptide chemistry.