O=C(C[C@H]1C/C=C\CC[C@@H](Cc2ccc(F)cc2)C(=O)O[C@@H](c2ccccc2)CNC1=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?