Hydroxy-PEG3-CH2COOtBu

mPEG3-propionic acid

CBZ-PEG5-bromide

Fmoc-PEG3-propionic acid

Mal-PEG1-NHS Ester

Mal-amido-PEG7-propionic acid

mPEG8-amine

Hydroxy-PEG4-CH2COOtBu

mPEG4-OMs

Propargyl-PEG3-alcohol

Maleimide-PEG12-NHS Ester

Hydroxy-PEG1-t-butyl ester

Hydroxy-PEG2-t-butyl ester

mPEG-thiol

CBZ-NH-PEG2-propionic acid

Maleimide-PEG4-PFE

mPEG23-propionic acid

Fmoc-PEG8-acetic acid

Maleimide-PEG4-NHS Ester

mPEG12-Maleimide