3-Azidopropionic acid CAS:18523-47-2 is a building block containing an azide group and a carboxylic acid group that reacts with a primary amine group in the presence of an activator such as EDC or DCC to form a stable amide bond.
Polyethylene Glycol PEG Linkers > Azide PEG > Azido-PEG-acid
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