Fmoc-PNA-D(tetraBoc)-OH is a peptide nucleic acid (PNA) monomer used in the synthesis of PNA oligomers. It features an Fmoc (9-fluorenylmethyloxycarbonyl) protecting group on the terminal amine and tetraBoc (tetra tert-butoxycarbonyl) protecting groups on the modified base D. These protecting groups help maintain the integrity of the monomer during the solid-phase synthesis process, allowing for precise and controlled assembly of PNA sequences. This monomer is valuable for creating PNAs with tailored binding characteristics and increased stability for various biochemical applications.