Atomic structure
There are 2 chemically distinct structures. Please, select:

NCCOP(=O)(O)O[C@H](CO)[C@H]1OC(O[C@@H]2CC(O)(C(=O)O)O[C@H]([C@@H](CO)OC3(C(=O)O)C[C@@H](O)[C@@H](O)[C@@H]([C@H](O)CO)O3)[C@@H]2O)(C(=O)O)C[C@@H](O)[C@H]1O