O=C1N[C@@H](Cc2ccccc2)COC(=O)[C@@H](Cc2ccc(F)cc2)CC/C=C/C[C@@H]1CC(=O)N(CCO)Cc1ccccc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?