NC(=O)[C@H]1CC2(CC(c3cccc(NC(=O)COc4ccc(Cl)cc4)c3)=NO2)CN1C(=O)[C@H]1CCC(=O)N1
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?