Bis-PEG5-acid (PROTAC Linker 36) is a polyethylene glycol (PEG) linker employed for the synthesis of CP5V, a PROTAC that selectively degrades Cdc20[1].
N-(Amino-PEG5)-N-bis(PEG4-acid) is a PEG-based PROTAC linker employed for synthesizing PROTACs. It comprises an amino group with two terminal carboxylic acids[1].