n (peg3 acid) n bis(peg3 amine)

N-(PEG3-acid)-N-bis(PEG3-amine) is a polyethylene glycol (PEG)-based linker used in the synthesis of proteolysis targeting chimeras (PROTACs) [1].

WUN 73823, also known as N,N'-bis-(acid-PEG3)-Benzothiazole Cy5 is a PEG derivative containing a cyanine dye with excitation/emission maximum 649/667 nm and a free terminal carboxyl acid. Terminal carboxylic acid can react with primary amine groups in the presence of of activators (e.g. EDC, or DCC) to form a stable amide bond. The hydophilic PEG spacer increases solubility in aqueous media. This product has no formal name at the moment. For the convenience of communication, a temporary code name was therefore proposed according to MedKoo Chemical Nomenclature (see web page: https://www.medkoo.com/page/naming).