COc1ccc(N2C(=O)N3[C@H](c4ccc(Cl)cc4)[C@@H]4C(=O)N(C5CCCCC5)C(=O)[C@@H]4[C@]3(C)C2=O)cc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?