CC[C@@]12C(=O)N(c3ccccc3)C(=O)N1[C@H](c1cccc(C)c1)[C@@H]1C(=O)N(Cc3ccccc3)C(=O)[C@@H]12
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?