Propargyl-PEG14-t-butyl ester consists of a propargyl group and a t-butyl protected carboxyl group. The propargyl group can be used in copper catalyzed Click Chemistry to yield a stable triazole linkage with azides. The t-butyl group can be hydrolyzed in acidic conditions. The hydrophilic PEG units help the molecule to have better solubility in aqueous environment.
