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4arm PEG, -((CH2)3NHCO-Norbornene)4, Mw 10,000
Chemical Name: Pentaerythritol tetra{3-[(5-norbornene-2-carbonyl)amino]propyl}-polyoxyethylene

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$55.00

4arm PEG, -((CH2)3-NH2)4, Mw 5,000
Chemical Name: Pentaerythritol tetra(aminopropyl) polyoxyethylene
CAS#: 804514-67-8

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$363.00
tBoc-NH-(CH2)2-O-(CH2CH2O)n-(CH2)2NH2, Mw 5,000
Chemical Name: α-2-aminoethyl-ω-2-[N-(tert-butoxycarbonyl)amino]ethoxy, polyoxyethylene
CAS#: 198227-38-2
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$231.00

Methoxy-PEG-(CH2)2NHCO(CH2)2-MAL, Mw 40,000
Chemical Name: α-[2-(3-Maleimido-1-oxopropyl)amino]ethyl-ω-methoxy, polyoxyethylene
CAS#: 724722-89-8

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