CCN(C[C@H]1N[C@@](Cc2ccccc2)(C(=O)OC)[C@H]2C(=O)N(C)C(=O)[C@@H]12)C(=O)Nc1ccc(F)cc1.O=C(O)C(F)(F)F
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?