CCCCCC(=O)N1CC2(CC(c3cccc(NC(=O)[C@@H]4CCC(=O)N4)c3)=NO2)C[C@@H]1C(N)=O
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?