C=CC[C@@H]1C=C[C@H](O/N=C2\c3cc(OC)ccc3O[C@H](c3cccc(OC)c3)[C@H]2O)[C@H](CO)O1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?