HO-PEG4-t-butyl ester is a high-purity PEG derivative with a hydroxyl group and a tert-butyl ester on a PEG4 spacer, specifically offering solubility, flexibility, and versatile use in conjugation and functionalization.
Polyethylene Glycol PEG Linkers > Hydroxy PEG > Hydroxy-PEG-t-butyl ester
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