Atomic structure

There are 4 chemically distinct structures. Please, select:

N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O

SVG file SMILES Show 3D Ionize

N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O