O=C1NC[C@H](c2ccccc2)OC(=O)[C@@H](Cc2ccc(F)cc2)CC/C=C/C[C@H]1CC(=O)N(CCO)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?