Fmoc-L-alpha-aminosuberic acid is widely used in peptide synthesis as a building block. Its primary application is in solid-phase peptide synthesis (SPPS), where it serves as a linker or spacer to introduce specific structural features into peptides. The Fmoc group provides protection for the amino group during synthesis, ensuring selective reactions. This compound is particularly useful in creating peptides with extended chains or modified backbones, enabling the study of peptide structure and function. It is also employed in the development of peptide-based drugs, biomaterials, and research tools, where precise control over peptide design is essential.