CC(C)(C)C1CC[C@H]2c3c([nH]c4ccc(Br)cc34)[C@H]3C(=O)N(c4ccccc4)C(=O)[C@H]3[C@H]2C1
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?