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tert-Butyl protected carboxylate PEG

tert-Butyl protected carboxylate PEG – PEGylation reagents activated with tert-butyl protected carboxylic acid, upon deprotection regenerating free acid. Functionalized PEG products include linear methoxy PEG (mPEG), bifunctional, multi-arm, branched PEG derivative, and PEG linkers.

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