DBCO-PEG1-NHS ester

endo-BCN-PEG12-NHS ester

DBCO-PEG2-acid，DBCO-PEG2-COOH

Propargyl-PEG4-t-butyl ester，Propargyl-PEG4-Boc

N-(t-butyl ester-PEG3)-N-bis(PEG3-amine)

endo-BCN-PEG3-NHS ester

Propargyl-PEG10-t-butyl ester，Propargyl-PEG10-Boc

DBCO-PEG8-amine TFA salt

Amino-Tri-(t-butoxycarbonylethoxymethyl)-methane

NH-bis(PEG3-Boc)，NH-bis(PEG3-C2-NH-Boc)

Propargyl-PEG4-(CH2)3-methyl ester

Propargyl-PEG2-acrylate

m-PEG17-propargyl

endo-BCN-PEG3-Boc-amine

Bis-propargyl-PEG4

Bis-propargyl-PEG3

APN-C3-PEG4-alkyne

Propargyl-PEG6-Ms

Propargyl-PEG5-NHS ester

Propargyl-PEG5-acid