TCO-PEG8-amine，TCO-PEG8-NH2

Methyltetrazine-PEG2-maleimide

7-O-(Amino-PEG4)- paclitaxel

Me-Tetrazine-PEG4-amine HCl salt

Tos-PEG21-Tos

Diazo-PEG3-TCO

Azido-PEG4-tetra-Ac-beta-D-glucose

Tos-PEG4-acid

Active-Mono-Sulfone-PEG8-acid

SPDP-PEG12-acid

SPDP-PEG24-NHS ester

Methyltetrazine-PEG4-NH-Boc

Methyltetrazine-PEG4-NHS ester

Azido-PEG4-beta-D-glucose

NHS ester-PEG4-Val-Cit-PAB-MMAE

Tetrazine-PEG5-NHS ester

TCO-PEG2-amine，TCO-PEG2-NH2

Azido-PEG3-Sulfone-PEG4-t-butyl ester，Azido-PEG3-Sulfone-PEG4-Boc

Tos-PEG5-CH2CO2tBu，Tos-PEG4-CH2-Boc

m-PEG5-succinimidyl carbonate