CCN1C(=O)[C@H]2[C@@H](C1=O)[C@@H](c1ccc(-c3ccc(C(C)=O)cc3)cc1)N[C@@]2(Cc1ccccc1)C(=O)OC.O=C(O)C(F)(F)F
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?