This compound is widely used in bioconjugation and peptide synthesis due to its ability to link molecules through amine groups. The Fmoc protecting group ensures selective deprotection, enabling controlled reactions in peptide assembly. Its PEG4 spacer enhances solubility and reduces steric hindrance, making it ideal for creating stable and biologically active conjugates. It is particularly valuable in drug delivery systems, where it facilitates the attachment of therapeutic agents to targeting molecules, improving specificity and efficacy. Additionally, it is employed in the development of biosensors and diagnostic tools, where precise molecular labeling is critical for accurate detection and analysis.