N-(t-butyl ester-PEG24)-N-bis(PEG23-Azide) is a trifunctional molecule combining two azides and a t-butyl ester, all joined together by a tertiary amine at its center. The azide functions can be used in click chemistry with terminal alkynes or strained cyclooctynes like BCN or DBCO while the t-butyl ester can be deprotected and made into amides or esters by reacting with amines or alcohols respectively. The PEG spacer provides aqueous solubility and altered DMPK.
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