4-[methyl(phenyl)amino]butanoic acid

Acid-PEG6-t-butyl ester，Acid-PEG6-C2-Boc

Carboxy-PEG4-sulfonic acid

N-Boc-N'-(PEG1-t-butyl ester)-L-Lysine-OH

Azido-PEG3-CH2CO2H，N3-PEG3-CH2COOH

Azido-PEG9-NHS ester

Carboxy-PEG2-sulfonic acid

Acid-PEG5-TEMPO

Fmoc-N-amido-PEG4-CH2-aldehyde

Ald-CH2-PEG5-azide

Ald-Ph-PEG4-acid，Ald-Ph-amido-PEG4-C2-acid

Fmoc-N-amido-PEG11-CH2-aldehyde

Azido-PEG3-acid，N3-PEG3-CH2CH2COOH

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

Ald-Ph-PEG24-acid

t-butyl ester-PEG5-CH2COOH，Acid-C1-PEG5-Boc

Azido-PEG6-acid

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

Acid-PEG1-t-butyl ester，Acid-PEG1-C2-Boc

Ald-CH2-PEG4-t-butyl ester，Ald-CH2-PEG4-Boc