Used in peptide synthesis to introduce a modified arginine residue with dimethylated guanidine group. The Fmoc group allows for solid-phase synthesis by providing orthogonal protection, while the asymmetrical dimethylation mimics natural post-translational modifications found in proteins. This modification is particularly useful in studying protein arginine methylation, which plays a key role in epigenetic regulation, signal transduction, and RNA processing. The compound helps in preparing methylated histone peptides for use in biochemical assays, enzyme studies, and inhibitor development targeting protein methyltransferases or demethylases. Its structure supports improved cellular uptake and stability in certain peptide-based drug designs.