Bis-(N,N'-carboxyl-PEG4)-Cy5

NH-bis(PEG3-OH)，NH-bis-PEG4

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

Amino-PEG4-alcohol，2-{2-[2-(2-Aminoethoxy)ethoxy]ethoxy}ethanol

Propargyl-PEG10-acid

N-(Biotin-PEG4)-N-bis(PEG4-acid) HCl salt

t-Boc-N-Amido-PEG3-azide，Boc-N-Amido-PEG3-azide

N-(Azido-PEG3)-N-bis(PEG3-acid) HCl salt，N-(Azido-PEG3)-N-bis(PEG3-acid)

DBCO-PEG6-acid

Bromoacetamido-PEG4-NHS ester

DBCO-PEG24-NHS ester

N-Boc-PEG23-bromide

t-Boc-N-Amido-PEG2-azide，Boc-N-Amido-PEG2-C2-azide

1,1,1-Trifluoroethyl-PEG4-amine

endo-BCN-PEG8-acid

N-Boc-PEG12-alcohol

N-Benzyl-N-bis(PEG1-OH)，N-Benzyl-N-bis-PEG2

Acryloyl-PEG-NHS，MW：20000

IA-PEG-NHS，Iodoacetyl-PEG-NHS，MW：10000

Pyrene-PEG5-propargyl