Azide-PEG8-Amido-tri-(t-butoxycarbonylethoxymethyl)-methane is a multifunctional reagent containing an azide and three t-butyl esters. The azide is reactive with terminal alkynes, DBCO, BCN for click chemistry. The t-butyl esters can be deprotected and subsequently reacted with primary amine groups to form stable amide bonds.
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