N-(Azido-PEG2)-N-Boc-PEG4-Boc Catalog No.:M25274-C InChi: InChI=1S/C16H16N4O2/c1-9-6-14(12(17)8-15(9)21)20-19-11-3-4-13-10(7-11)2-5-16(22)18-13/h3-4
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