C[C@H]1CN([C@@H](C)CO)C(=O)c2cccc(NC(=O)Nc3ccc(C(F)(F)F)cc3)c2O[C@@H]1CN(C)C(=O)Nc1ccc(F)cc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?