T-Boc-Aminooxy-PEG-NHS ester is a compound that belongs to the class of PEGylation reagents used in pharmaceutical research and development. It contains several functional groups that are crucial for its application in drug development. The t-Boc group is a protecting group that protects the amino group during the reaction, while the aminooxy group is used for bioconjugation with aldehydes or ketones. NHS (N-hydroxysuccinimide) ester is a common reactive group that is used for amine coupling. The PEG (polyethylene glycol) moiety of the compound helps to increase the solubility, stability, and pharmacokinetics of the drug molecules.t-Boc-Aminooxy-PEG-NHS ester is an important tool in the development of drug delivery systems, antibody-drug conjugates, and imaging agents for pharmaceutical applications.