Propargyl-PEG5-t-butyl ester，Propargyl-PEG5-Boc

endo-BCN-PEG4-NHS ester

N-Me-N-bis(PEG2-propargyl)

Propargyl-PEG18-alcohol

Propargyl-PEG14-alcohol

DBCO-PEG1-acid，DBCO-PEG1-COOH

Propargyl-PEG12-amine

2-Amino-1,3-bis(tert-butyldimethylsilanoxy)propane

DBCO-NHCO-PEG13-acid

DBCO-NHCO-PEG13-NHS ester

Propargyl-PEG3-amine，Propargyl-PEG3-NH2

endo-BCN-PEG2-alcohol

Propargyl-PEG10-amine

DBCO-PEG12-NHS ester

endo-BCN-PEG4-acid

Alkyne-ethyl-PEG1-t-Butyl ester，Alkyne-ethyl-PEG1-Boc

Propargyl-PEG4-amine

Propargyl-PEG4-alcohol

N-(Amino-PEG3)-N-bis(PEG4-t-butyl ester)，N-(Amino-PEG3)-N-bis(PEG4-Boc)

endo-BCN-pentanoic acid