CCSc1ccc([C@@H]2[C@@H]3C(=O)N(CC)C(=O)[C@@H]3[C@]3(C(=O)OC)CCCCN23)cc1OC.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. How many hydrogen bond acceptors does the molecule contain?