CC(=O)OC[C@@H]1O[C@@H](O/N=C2/C[C@@H](O)[C@@H](O)[C@H]3[C@@H]2CC[C@H]2C(=O)N(c4ccc(F)cc4F)C(=O)[C@H]32)[C@H](OC(C)=O)[C@H](OC(C)=O)[C@@H]1OC(C)=O
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?