O=C(C[C@H]1C/C=C\CC[C@H](Cc2ccc(F)cc2)C(=O)OC[C@@H]2CCCN2C1=O)N[C@H](CO)Cc1ccccc1
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?