2112731-94-7

N-(Azido-PEG3)-N-Boc-PEG4-t-butyl ester is a branched molecule with a terminal azide group and a t-butyl ester group. Azide (N3) enables PEGylation via Click Chemistry. Boc group and the t-butyl protected carboxyl group can be deprotected under mild acidic conditions.