CC[C@]12c3[nH]c4ccc(Cl)cc4c3CCN1C(=O)[C@@H](CC(=O)NCCCOC)C[C@@H]2C(=O)N1CCN(C(=O)c2ccco2)CC1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?