Azido-PEG2-acid，Azido-PEG2-C2-acid

Mal-amido-PEG4-TFP ester

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

Mal-PEG1-t-butyl ester，Mal-PEG1-Boc

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

Ald-Ph-PEG5-azide

Ald-Phenyl-PEG5-t-butyl ester，Ald-Ph-PEG5-Boc

Mal-PEG3-alcohol

Mal-heptanoic NHS ester，EMCS，N-Succinimidyl 6-maleimidohexanoate

Mal-amido-PEG11-amine TFA salt

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

Azido-PEG5-CH2CO2H

Acid-PEG6-mono-methyl ester

Mal-amido-PEG10-acid

6-Maleimidocaproic acid PFP ester

1-(2-hydroxymethyl)-1-H-pyrrole-2,5-dione

Mal-amido-PEG12-TFP ester

Mal-amido-PEG4-NHS

Cbz-N-amido-PEG3-acid，Cbz-NH-PEG3-C2-acid

N-(2-Aminoethyl)maleimide TFA salt，Mal-NH2 TFA