CC1CCN(CCCN2C(=O)C3C(C(=O)Nc4ccc(Cl)cc4)C4C=CC3(O4)C2C(=O)NC2CCCCC2)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?