2-(Azido-PEG3-amido)-1, 3-bis(NHS ester) 24485 InChi: InChI=1S/C27H24N2O4/c1-18-13-22(30)14-19(2)23(18)15-24-25(31)28(16-20-9-5-3-6-10-20)27(33)29(26(24)32)17-21-11-7-4-8-12-21/h3-15
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