BCN-PEG4-NHS ester CAS:2252422-32-3 is a bifunctional PEG reagent. It includes a BCN group, a PEG4 spacer, and an NHS ester. BCN reacts with azides, forming triazole linkages in copper-free click chemistry.
Polyethylene Glycol PEG Linkers > BCN-PEG > Other-BCN-PEG
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