Atomic structure
There is only one chemically distinct structure:
COc1cc(/C=C/C(=O)OC[C@H]2O[C@@H](Oc3c(-c4ccc(O)c(O)c4)oc4cc(O)cc(O)c4c3=O)[C@H](O)[C@@H](O)[C@@H]2O)ccc1O