Biotin-PEG7-amine Catalog No.:M32029-C Smiles: CC1(C)C2[C@@H](O)C(=O)[C@@]3(C)[C@H]([C@H](OC(=O)C4C=CC=CC=4)[C@]1(O)C[C@H](O)C=2C)[C@@]1(CO[C@@H]1C[C@@H]3O)OC(C)=O
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