CCCCCCSc1ccc([C@H]2N[C@@](CC(C)C)(C(=O)OC)[C@H]3C(=O)N(C)C(=O)[C@@H]23)cc1.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?