The high purity Cbz-N-Amido-PEG4-CH2COOH CAS: 1451362-51-8 provided by Axispharm is a peg derivative containing a Cbz-protected amine at one end and a carboxylic acid group at the other end.
Polyethylene Glycol PEG Linkers > Acid PEG > Cbz-N-Amido-PEG-CH2COOH
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