CC(C)(C)[C@H]1COC(=O)[C@@H](Cc2ccc(F)cc2)CC/C=C/C[C@@H](CC(=O)N[C@@H](CO)Cc2ccccc2)C(=O)N1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?