CS(=O)(=O)c1ccc(C2=C(CNC(=O)c3ccc([N+](=O)[O-])cc3)[C@H]3CC[C@@H](C2)N3CCOc2ccccc2)cc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?