This compound, Z-D-Arg(Pbf)-OH·CHA, is a protected derivative of D-arginine primarily used in solid-phase peptide synthesis (SPPS) for the production of complex peptides and proteins. The Z (benzyloxycarbonyl) group protects the α-amino group, while the Pbf (2,2,4,6,7-pentamethyldihydrobenzofuran-5-sulfonyl) group protects the guanidine side chain, ensuring stability and preventing unwanted reactions during the synthesis process. It is provided as a cyclohexylamine (CHA) salt to enhance solubility and handling. This reagent is essential in pharmaceutical research and development for creating bioactive peptides in drug discovery and therapeutic applications, as well as in studies of protein structure, function, biochemical pathways, and molecular interactions.