N-(Acid-PEG8)-N-bis(PEG8-Azide) is a trifunctional molecule that combines two azide functions with a carboxylic acid via a tertiary amine at its center. The azides can be reacted with terminal alkynes or cyclooctynes to form stable triazoles with a target molecule. Meanwhile, the carboxylic acid can be coupled with amines using reagents such as HATU or EDC.
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