N,N-Bis(PEG2-propargyl)-4-oxo-butanoic NHS ester is a branched PEG liner with a terminal hydroxy group and two propargyl groups. The hydroxy group can be derivatized to other reactive functional groups. The propargyl groups readily reacted with azide-bearing compounds or biomolecules via copper catalyzed azide-alkyne Click Chemistry to yield a stable triazole linkage.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.