CC(C)[C@H](NC(=O)[C@H](C(C)C)N(Cc1ccccc1)Cc1ccccc1)C(=O)N(C)[C@H](C(=O)N1CCC[C@H]1C(=O)N(C)[C@H](C)C(=O)NCc1ccc(F)cc1)C(C)C
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?