NC(=O)[C@@H]1CC2(CC(c3cccc(NC(=O)[C@@H]4CCC(=O)N4)c3)=NO2)CN1C(=O)Cc1ccc([N+](=O)[O-])cc1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?