Hydrox-PEG21-Tos，PEG21-Tos

3,4-Dibromo-Mal-PEG4-t-butyl ester，3,4-Dibromo-Mal-PEG4-Boc

Methyltetrazine-PEG12-amine HCl salt

NH-bis(PEG4-acid) HCl salt，NH-bis(PEG4-acid)

m-PEG7-Ms

m-PEG16-NHS ester

Diketone-PEG11-Diketone

(4-methoxyphenyl)diphenylmethylamino-PEG7，Methoxy-Tr-NH-PEG7

N-(Azido-PEG3)-N-(PEG3-NH-Boc)-PEG3-acid

m-PEG5-Tos

Pyrene-PEG3-azide，Pyrene-amido-PEG4-azide

Ald-PEG4-azide，N3-PEG4-CH2CH2CHO

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

Mal-PEG8-alcohol

Mal-PEG6-NHS ester

Bis-(Norbornene-PEG23)-disulfides

N-methyl-N'-methyl-O-(m-PEG4)-O'-(acid-PEG5)-Cy5

Bis-PEG10-NHS ester

Biotin-PEG8-amine

N-(Azido-PEG10)-N-PEG10-t-butyl ester