CCCc1ccc(C(=O)[C@@H]2[C@@H](C(C)=O)N3c4ccc(F)cc4C=C[C@@H]3[C@@]23C(=O)Nc2ccccc23)cc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?