Propargyl-PEG4-CH2COONHS

mPEG23-NHS Ester

Maleimide-PEG12-propionic acid

mPEG8-thiol

Hydroxy-PEG2-CH2COOtBu

Fmoc-PEG4-propionic acid

HO-PEG13-OH

mPEG11-amine

Hydroxy-PEG12-propionic acid

mPEG7-propionic acid

Mal-PEG2-NHS Ester

mPEG24-NHS Ester

Hydroxy-PEG5-CH2COOtBu

Maleimide-PEG6-PFE

mPEG10-NHS Ester

mPEG7-thiol

mPEG12-thiol

CBZ-NH-PEG3-alcohol

Fmoc-PEG12-acetic acid

HO-PEG24-OH