DBCO-PEG5-amine，DBCO-PEG5-NH2

Azido-PEG3-acid，N3-PEG3-CH2CH2COOH

Mal-PEG6-NHS ester

Thalidomide-O-PEG4-Azide

Mal-PEG4-acid

Mal-PEG4-amine TFA salt

Azido-PEG5-succinimidyl carbonate

Mal-amido-PEG6-NHS

Cbz-N-amido-PEG8-acid，Cbz-NH-PEG8-C2-acid

Azido-PEG3-t-butyl ester，N3-PEG3-CH2CH2-Boc

Ald-Ph-PEG6-acid

17-(Azide-PEG9-ethylcarbamoyl)heptadecanoic t-butyl ester

Mal-PEG12-alcohol

Mal-amido-PEG8-TFP ester

Azido-PEG1-NHS ester

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

Azido-PEG3-PFP ester

Ald-Ph-PEG2-NHS ester，Ald-Ph-amido-PEG2-C2-NHS ester

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

Acid-PEG10-t-butyl ester