C[C@H]1CN([C@H](C)CO)C(=O)c2cc(NS(=O)(=O)c3ccc(Cl)cc3)ccc2O[C@H](C)CCCCO[C@@H]1CN(C)Cc1ccccc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?