Used in peptide synthesis and pharmaceutical research as a modified amino acid building block. The nicotinoyl group enables NAD-related biochemical activity, making it valuable in studies involving enzyme cofactors and metabolic pathways. Commonly employed in the development of bioactive peptides, enzyme inhibitors, and probes for studying acetylation-mimetic processes. Its structure supports enhanced cellular uptake and stability in biological assays. Widely applied in medicinal chemistry for designing compounds targeting dehydrogenases and sirtuin-related enzymes.