t-Boc-Aminooxy-PEG-Azide is a molecule that contains several functional groups, making it a versatile tool for various applications, particularly in pharmaceutical research and development. The molecule has a tertiary-butyl carbamate (t-Boc) group, which protects the amino group from undesired reactions during synthesis. Additionally, it features an aminooxy group that can react with carbonyl compounds, and an azide group that can react with alkynes via copper-catalyzed click chemistry. These functional groups allow for the precise and efficient modification of biological molecules, such as proteins and peptides, which can be used in drug discovery and development.