N-(m-PEG4)-N'-(azide-PEG4)-Cy3 is a polyethylene glycol (PEG)-derived linker, specifically designed for the synthesis of proteolysis targeting chimeras (PROTACs)[1].
N-Methyl-N'-methyl-O-(m-PEG4)-O'-(azide-PEG4)-Cy3 is a polyethylene glycol (PEG) based linker commonly employed in the synthesis of Proteolysis Targeting Chimeras (PROTACs)[1].