CN(C(=O)c1cccc(NC(=O)Cc2ccc(NC(=O)C3CCCN(S(=O)(=O)c4cccc([N+](=O)[O-])c4)C3)cc2)c1)C1CCCC1
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?