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Atomic structure
There is only one chemically distinct structure:
*O[C@@H]1[C@@H](C(N)=O)O[C@@H](O[C@@H]2[C@@H](C(N)=O)O[C@@H](O[C@@H]3[C@H](C(=O)O)O[C@@H](O[C@@H]4[C@@H](NC(C)=O)[C@H](*)O[C@H](C)[C@H]4NC(C)=O)[C@@H](NC(C)=O)[C@H]3NC(C)=O)[C@@H](NC(C)=O)[C@H]2NC(C)=O)[C@H](NC(C)=O)[C@H]1NC(=O)[C@H](C)N