Used extensively in bioconjugation and click chemistry applications, this compound facilitates the attachment of biomolecules to various substrates. Its PEG spacer enhances solubility and reduces steric hindrance, making it ideal for modifying peptides, proteins, and antibodies. The endo-BCN group enables efficient, rapid, and selective reactions with azide-functionalized molecules, commonly employed in drug delivery systems, diagnostic probes, and surface functionalization. Its versatility supports advancements in targeted therapies and bioimaging techniques.