Atomic structure
There are 4 chemically distinct structures. Please, select:

[*]O[C@H]1[C@H](O)[C@@H](COC(C)=O)O[C@@H](O[C@@H]2[C@@H](O)[C@@H]([*])O[C@@H]3COC(C)(C(=O)O)O[C@@H]32)[C@@H]1O