Used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) methods. It serves as a building block for introducing D-arginine residues into peptide chains. The Fmoc (fluorenylmethyloxycarbonyl) group acts as a protecting group for the amino group, ensuring selective reactions during synthesis. This compound is essential in creating peptides with specific sequences for research in biochemistry, drug development, and biotechnology. It is also applied in the study of peptide-based therapeutics and enzyme inhibitors. Its use is critical in producing peptides with high purity and precise structures.