2-t-Butoxycarbonylamino-1,3-bis(carboxyethoxy)propane

t-butyl ester-PEG25-Amide-Tri(3-methoxypropanamide-PEG23-Azide) Methane

N-Mal-N-bis(PEG4-acid)，Mal-N-bis(PEG4-C2-acid)

Tri(Mal-PEG2-amide)-amine

N-(Azido-PEG2)-N-Fluorescein-PEG4-acid

N-(Azido-PEG2)-N-Fluorescein-PEG3-acid

N-Boc-N-bis(PEG4-NHS ester)

N-(PEG1-OH)-N-Boc-PEG2-propargyl

N-(TCO)-N-bis(PEG4-NHS ester)

N-(Azido-PEG2)-N-Boc-PEG4-acid

N-DBCO-N-bis(PEG2-NHS ester)，N-DBCO-N-bis(PEG2-C2-NHS ester)

N-Boc-N-bis(PEG4-acid)

Methyltetrazine-amido-N-bis(PEG4-acid)

4-(N-Boc-amino)-1,6-heptanedioic acid

N-(Azido-PEG4)-N-Boc-PEG3-t-butyl ester，N-Azido-PEG4-N-Boc-N-PEG3-Boc

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

Tetra-(amido-PEG23-azide)

1,3-bis(carboxyethoxy)-2,2-bis(carboxyethoxy)propane

Hydroxy-Amino-bis(PEG1-t-butyl ester)，Hydroxy-Amino-bis(PEG1-C2-Boc)

N-Boc-N-bis(PEG4-OH)