N-(azide-PEG3)-N'-(PEG4-acid)-Cy5

N-(m-PEG4)-N'-(PEG4-acid)-Cy5

Bromo-PEG3-t-butyl ester，Br-PEG3-C2-Boc

Cy5-PEG3-azide

Fmoc-PEG6-NHS ester

m-PEG10-azide

NH-bis(PEG4-OH)，NH-bis-PEG5

Azido-PEG2-CH2CO2-t-Bu，Azido-PEG2-C1-Boc

Fluorescein-PEG2-azide，Fluorescein-thiourea-PEG2-azide

Bis-PEG29-acid

Methyltetrazine-PEG12-acid

Fluorescein-PEG6-NHS ester

Bis-PEG4-NHS ester

Fmoc-N-amido-PEG7-acid

PEG22，HO-PEG21-OH

Bromoacetamido-PEG5-DOTA

13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester

DNP-PEG4-t-butyl ester，DNP-NH-PEG4-C2-Boc

Azido-PEG4-CH2CO2H

S-acetyl-PEG12-alcohol