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