N-DBCO-N-bis(PEG2-C2-NHS ester) is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs[1]. N-DBCO-N-bis(PEG2-C2-NHS ester) is a click chemistry reagent, it contains a DBCO group that can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing Azide groups.