This chemical is primarily used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected amino acid derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group protects the amine functionality, and the Dde (1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl) group protects the side chain of ornithine. The Dde group is selectively removable under mild conditions, allowing for orthogonal deprotection strategies. This makes it valuable in the synthesis of complex peptides, especially those requiring selective modification or conjugation at specific sites. It is commonly employed in the production of peptides for research, pharmaceuticals, and biotechnology applications, enabling precise control over the peptide structure.