CO[C@@H]1[C@@H](O)[C@@H](O)[C@H](Oc2ccc(-c3ccc(Oc4ccccc4)cc3)c(C(=O)NCCCc3ccccc3)c2)OC1(C)C
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?