COc1cccc([C@H]2Oc3ccc(OC)cc3/C(=N\O[C@@H]3O[C@H](COC(C)=O)[C@H](OC(C)=O)[C@H](OC(C)=O)[C@H]3OC(C)=O)[C@@H]2O)c1
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?