Amino-PEG3-t-butyl ester is a PEG derivative containing an amino group with the t-butyl protected carboxyl group. The t-butyl protected carboxyl group can be deprotected under acidic conditions.
Ald-Ph-amido-C2-PEG3-NH-Boc is a polyethylene glycol (PEG)-based bifunctional linker utilized for the synthesis of Proteolysis Targeting Chimeras (PROTACs)[1].