PEG2-bis(phosphonic acid)

SPDP-PEG12-NHS ester

Propargyl-PEG5-tetra-Ac-beta-D-glucose

TCO-PEG3-amine

BocNH-PEG3-CH2CH2NHMe

(S, R, S)-AHPC-PEG4-Azide

PEG5-Ms

(S, R, S)-AHPC-PEG6-NHS ester

APN-PEG36-tetrazine

Bromo-PEG3-phosphonic acid

Thalidomide-O-PEG4-NHS ester

Acid-PEG13-NHS ester

Ms-PEG5-Ms

N-(Methylamino-PEG3)-NH-PEG3-acid

Acid-PEG4-Sulfone-PEG4-acid，Sulfone-Bis-PEG4-acid

TCO-PEG4-Fmoc-Gly-Gly-Gly

Methyltetrazine-PEG9-acid

PEG8-Ms，PEG7-O-Ms

Tetrazine-PEG5-NH-CH2CH2-4-Phenol

TCO-PEG8-TFP ester