C[C@H](O)[C@@H]1CN2CCc3c([nH]c4ccc(-c5ccc6c(c5)OCO6)cc34)[C@@H]2C[C@@H]1N(C)C(=O)Nc1cc(Cl)cc(Cl)c1
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?