m-PEG4-NHS ester

Bromo-PEG1-CH2CO2H，(2-Bromoethoxy)acetic acid

m-PEG11-Tos

DNP-PEG12-acid

Mal-amido-PEG24-acid

Dimethylanaline-PEG4-acid

PEG13，Dodecaethylene glycol ，HO-PEG12-OH

Fmoc-NH-PEG5-CH2COOH

m-PEG7-azide

N-(Mal-PEG6)-N-bis(PEG7-TCO)

17-(Bromoacetamido-PEG6-ethylcarbamoyl)heptadecanoic t-butyl ester

N-(Azido-PEG3)-N-bis(PEG3-acid) HCl salt，N-(Azido-PEG3)-N-bis(PEG3-acid)

Bromo-PEG4-t-butyl ester，Br-PEG4-C2-Boc

Bromo-PEG5-bromide

Fmoc-N-amido-PEG2-acid，Fmoc-NH-PEG2-CH2CH2COOH

m-PEG12-NHS ester

N-(Azido-PEG3)-N-(BocNH-PEG2)

N-Boc-N-bis(PEG2-acid)

Hydroxy-Amino-bis(PEG1-t-butyl ester)，Hydroxy-Amino-bis(PEG1-C2-Boc)

Acid-PEG8-t-butyl ester