Bromo-PEG2-alcohol， 2-(2-bromoethoxy)benzoic aldehyde

17-(Bromoacetamido-PEG9-ethylcarbamoyl)pentanoic t-butyl ester

S-Acetyl-ethylene-amide-PEG11-Mal

m-PEG8-azide

m-PEG6-Ms

Methyltetrazine-PEG8-amine HCl salt

Cbz-N-amido-PEG5-acid，Cbz-NH-PEG5-C2-acid

Mal-PEG2-Amide

m-PEG25-acid

Mal-PEG4-trimethylammonium chloride

Azido-PEG3-acid，N3-PEG3-CH2CH2COOH

Bis-PEG14-acid

Methylamino-PEG4-acid HCl salt，Methylamino-PEG4-acid

Azido-PEG4-nitrile

t-Boc-N-amido-PEG10-azide

N-(m-PEG4)-N'-(4-hydroxycyclohexyl-1-amido-PEG4)-Cy5

Azide-PEG2-Ms

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

Azido-PEG16-NHS ester

Acid-PEG4-mono-methyl ester