18-(Bromoacetamido-PEG4-ethylcarbamoyl)heptadecanoic-t-butyl ester has a bromine on a PEG linker with an alkane tail that has a t-butyl ester group. The bromine (Br)can be used as a leaving group for nucleophilic substitution reactions. The t-butyl group can be deprotected under acidic conditions. This compound may also be used as a building block for lipids in nanotechnolgy and drug delivery.
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