Cbz-NH-PEG2-C2-acid oxy-PEG2)-N-bis(PEG3-propargyl) Smiles: OC1(O)C2C3=C4OC1(O)C(=O)C=C2C(=O)O[C@H]1[C@@H]2COC(=O)C5=CC(O)=C(O)C(O)=C5C5=C(C=C(O)C(O)=C5O)C(=O)O[C@H]1[C@H](OC(=O)C3=CC(O)=C4O)[C@@H](O2)OC(=O)C1C=C(O)C(O)=C(O)C=1
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