Ald-PEG1-C2-Boc is an alkyl-ether-based linker utilized for the synthesis of PROTACs, a class of small molecules that induce targeted protein degradation[1].
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].