CC[C@@]12C(=O)N(c3cccc(Cl)c3)C(=O)N1[C@H](c1ccc(Br)cc1)[C@@H]1C(=O)N(C(C)(C)C)C(=O)[C@@H]12
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. This compound should contain a more electronegative atom (more electronegative than hydrogen) with lone electron pairs. Then it can attract protons from a donor. Moreover, the electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?