DBCO-N-ethyl-2-oxopropanamide

Thiol-PEG3-acid

S-acetyl-PEG4-propargyl

S-acetyl-PEG8-alcohol

S-acetyl-PEG4-alcohol

DBCO-PEG20K-OMe

S-acetyl-PEG3-acid，S-Acetyl-PEG3-C2-acid

Methyltetrazine-acid

Methyltetrazine-PEG24-NHS ester

Thiol-PEG4-alcohol，HS-PEG4-OH

Active-Mono-Sulfone-PEG8-amido-Methyltetrazine

Propargyl-PEG1-Acetic acid-NHS ester

Methyltetrazine-PEG5-alkyne

Methyltetrazine-PEG4-maleimide

Dec-9-ynoic acid

Methyltetrazine-PEG4-t-butyl ester

Lipoamido-PEG2-alcohol，Lipoamido-PEG2-OH

S-Acetyl-ethylene-amide-PEG11-Mal

DBCO-DBCO

S-Acetyl-ethylene-amide-PEG11-amine