t-butyl ester-C5-tris-PEG3-azide functions as a branched PEG linker consisting of PEG3 arms to bolster solubility and flexibility, while the terminal acid-labile tert-butyl ester liberates a carboxylic acid, enabling versatile bioconjugation, drug linker design, and biomaterials applications in life science research. The three azides serve as click chemistry handles for alkyne-bearing molecules. The branched architecture supports attachment of ADC payloads or other molecules.
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