CCN1C(=O)[C@H]2[C@@H](C1=O)[C@@H](c1ccc(-c3ccc(Cl)c(Cl)c3)cc1)N[C@@]2(C)C(=O)OC.O=C(O)C(F)(F)F
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?