Used primarily in solid-phase peptide synthesis as a Fmoc-protected nucleoside amino acid building block. Enables incorporation of modified nucleobase structures into peptide sequences for developing bioconjugates and nucleopeptides. Commonly applied in the synthesis of peptide-oligonucleotide conjugates for targeted drug delivery, molecular probes, and antisense therapeutics. Its design allows orthogonal protection strategies, facilitating stepwise assembly in automated synthesizers. Also utilized in research settings to study nucleic acid-protein interactions and to develop diagnostic tools and synthetic vaccines.