m-PEG12-acid

m-PEG11-acid

m-PEG10-NHS ester

m-PEG1-NHS ester

m-PEG24-Mal

m-PEG17-NHS ester

m-PEG4-hydrazide

m-PEG6-acid，m-PEG5-CH2CH2COOH

m-PEG7-(CH2)3-alcohol，m-PEG7-CH2-OH

3-(m-PEG8-ethoxycarbonyl)propanoic acid，m-PEG8-ethoxycarbonyl-propanoic acid

Tetraethylene glycol

m-PEG16-acid

m-PEG9-alcohol，Nonaethylene glycol monomethyl ether

m-PEG4-Ms，m-PEG3-OMs

m-PEG3-aldehyde

1,1,1-Trifluoroethyl-PEG5-alcohol

1-isothiocyanato-PEG4-Alcohol

Hydroxy-PEG3-acrylate

C11-PEG9-alcohol

m-PEG9-Ms