Ald-Ph-PEG3-NH-Boc，Ald-Ph-amido-C2-PEG3-NH-Boc

Acid-PEG5-t-butyl ester，Acid-PEG5-C2-Boc

2-((Azido-PEG8-carbamoyl)methoxy)acetic acid

Azido-PEG5-NHS ester

Acid-PEG4-t-butyl ester，Acid-PEG4-C2-Boc

Cbz-N-amido-PEG10-acid

Dimethylanaline-PEG4-acid

Azido-PEG7-acid

Cbz-N-amido-PEG6-acid，Cbz-NH-PEG6-C2-acid

Azido-PEG10-acid

Acid-PEG4-mono-methyl ester

Azidoacetic acid NHS ester

Azido-PEG1-acid，Azido-PEG1-C2-acid

Ald-CH2-PEG4-CH2CO2tBu，Ald-CH2-PEG3-CH2-Boc

Ald-CH2-PEG3-azide

Azido-PEG2-acid，Azido-PEG2-C2-acid

Cbz-N-amido-PEG2-acid，Cbz-NH-PEG2-C2-acid

Azido-PEG4-NHS ester

Ald-Phenyl-PEG2-t-butyl ester，Ald-Ph-PEG2-Boc

Azido-PEG10-NHS ester