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Atomic structure
There is only one chemically distinct structure:
*O[C@H]1[C@@H](C(=O)O)O[C@H](O[C@H]2[C@H](NC(=O)C[C@@H](O)C[C@H](C)O)[C@@H](C)O[C@H](O[C@@H]3[C@H](O)[C@H](C)O[C@@H](*)[C@H]3NC(C)=O)[C@@H]2NC(C)=O)[C@H](NC(C)=O)[C@H]1O