Mal-PEG12-acid

Mal-PEG2-amine TFA salt，Mal-PEG2-NH2

Mal-PEG12-NHS ester

Acid-PEG3-mono-methyl ester

Mal-amido-PEG9-amine TFA salt，Mal-amido-PEG9-amine

Mal-amido-PEG24-acid

Azido-PEG8-CH2CO2-NHS，Azido-PEG8-C1-NHS ester

Azide-PEG5-t-butyl ester，Azide-PEG5-Boc

Azido-PEG1-CH2CO2-NHS

Azido-PEG12-NHS ester

Azido-PEG8-CH2CO2H，N3-PEG8-CH2COOH

Mal-PEG1-NHS ester

Mal-amido-PEG11-amine TFA salt

Thalidomide-O-acetamido-C4-amine HCl salt

Azido-PEG8-CH2CO2-PFP

Acid-PEG25-t-butyl ester

Azido-PEG9-NHS ester

Ald-Ph-PEG3-azide，Ald-Ph-amido-C2-PEG3-azide

Carboxy-PEG2-sulfonic acid

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