N-(Azide-PEG8-carbonyl)-N-bis(PEG8-acid) is a trifunctional linker combining two carboxylic acids and a terminal azide group. The azide is reactive towards terminal alkynes, BCN or DBCO groups using click chemistry, while the carboxylic acids are free to react with primary amines to form stable amide bonds. This is highly water-soluble PEG linker with altered ADME properties.
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