Z-Arg(MBS)-OH DCHA is primarily used in peptide synthesis as a protecting group for the guanidine moiety of arginine. The MBS (4-methoxybenzenesulfonyl) group shields the arginine side chain during the peptide coupling process, preventing unwanted side reactions. This compound is particularly valuable in solid-phase peptide synthesis (SPPS), where selective deprotection is required to build complex peptides step-by-step. Its stability under acidic conditions makes it suitable for use in Fmoc-based synthesis strategies. After the peptide chain is assembled, the MBS group can be removed under specific conditions, ensuring the integrity of the arginine residue in the final product. This chemical is essential for synthesizing peptides with high purity and accuracy, especially in research and pharmaceutical applications.