COC(=O)Cn1c(C(=O)N(C)C)cc2c1C[C@H]1CN(C(=O)c3ccccc3)[C@@](Cc3ccc(F)cc3)(C(=O)OC)[C@@H]21
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?