C/C=C\C=C\C(=O)N1CC2(CC(c3cccc(NC(=O)COc4ccc(Cl)cc4)c3)=NO2)C[C@H]1C(N)=O
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?