Used in pharmaceutical synthesis as a protected amino alcohol derivative, particularly in the development of PEGylated compounds. Its bromo terminus allows for further alkylation or nucleophilic substitution, while the Boc-protected amine enables controlled deprotection and coupling in peptide-like chains. Commonly employed in creating linkers for antibody-drug conjugates (ADCs) and prodrugs where water solubility and biocompatibility are required. The triethylene glycol-like spacer enhances hydrophilicity and flexibility, improving pharmacokinetic properties in final drug molecules.