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Methoxy-PEG-(CH2)3NHCO-CH2I, Mw 20,000 [1g amber glass bottle]
Methoxy-PEG-(CH2)3NHCO-CH2I, Mw 40,000 [1g amber glass bottle]
Methoxy-PEG-(CH2)3NHCO-CH2I, Mw 30,000 [1g amber glass bottle]