Hydroxy-PEG13-t-butyl ester，Hydroxy-PEG13-Boc

BCN-PEG3-VC-PFP Ester

THP-SS-PEG1-t-butyl ester，THP-SS-PEG1-Boc

4-Azide-TFP-Amide-PEG4-acid

Hydroxy-PEG20-t-butyl ester，Hydroxy-PEG20-Boc

Hydroxy-PEG8-t-butyl ester，Hydroxy-PEG8-Boc

Mal-PEG4-Val-Cit-PAB-OH

t-Butyl 3-(hydroxypropoxyl)-propanoate

Hydroxy-PEG4-CH2CO2tBu，Hydroxy-PEG4-CH2-Boc

Hydrox-PEG10-Tos，PEG10-Tos

Propargyl-PEG1-SS-alcohol

PC Mal-NHS carbonate ester

2-hydroxyethyl disulfide mono-Tosylate

Hydroxy-PEG6-CH2CO2tBu，Hydroxy-PEG6-CH2-Boc

TCO-PEG4-Val-Cit-PAB-PNP

Azido-PEG1-Val-Cit-PAB-OH

PC Alkyne-PEG4-NHS carbonate ester

Aminoethyl-SS-propionic acid

Hydroxy-PEG4-t-butyl ester，Hydroxy-PEG4-(CH2)2-Boc

3-[[2-[(4-azidobenzoyl)amino]ethyl]dithio]propanoicacid