Azido-PEG5-CH2CO2H，cas:217180-81-9

Azido-PEG5-CH2CO2-NHS，cas:2144777-77-3

Azido-PEG4-CH2CO2-tBu，cas:864681-04-9

Azido-PEG3-CH2CO2Me，cas:1253389-31-9

Benzyl-PEG2-CH2CO2tBu，cas:1309451-06-6

Tos-PEG6-CH2CO2tBu，cas:1949793-62-7

Tos-PEG5-CH2CO2H，cas:2028284-73-1

Bromo-PEG1-CH2CO2tBu，cas:157759-50-7

Ald-CH2-PEG5-t-butyl ester，cas:1446282-23-0

Ald-CH2-PEG5-azide，cas:1446282-38-7

Propargyl-PEG4-CH2CO2tBu，cas:888010-02-4

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