N-Boc-Azido-tris(ethylenoxy)-L-alanin，Azido-PEG3-Ala-Boc

m-PEG4-alcohol，Tetraethylene glycol monomethyl ether

DBCO-PEG5-Acrylate

N-(m-PEG4)-N'-(amino-PEG3)-Cy5 TFA salt，N-(m-PEG4)-N'-(amino-PEG3)-Cy5

Azido-PEG3-NHS ester，N3-PEG3-C2-NHS ester

N-methyl-N'-methyl-O-(m-PEG4)-O'-(propargyl-PEG4)-Cy5

Ald-Ph-PEG2-acid，Ald-Ph-amido-PEG2-C2-acid

m-PEG7-4-nitrophenyl carbonate

N-(HydroxRuixiG3)-N-bis(PEG4-t-butyl ester)

Methyltetrazine-PEG11-NH-Boc

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

t-Boc-N-amido-PEG1-acid，Boc-NH-PEG1-CH2CH2COOH

Fmoc-PEG8-alcohol

t-Boc-N-amido-PEG20-acid，Boc-NH-PEG20-CH2CH2COOH

N-(Methyltetrazine-PEG4)-amido-PEG8-3,4-dithiophenolmaleimide

Bis-Sulfone-PEG4-DBCO

Azido-PEG10-acid

Ald-Ph-PEG24-NHS ester

Azido-PEG7-NHS ester

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