You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
It belongs to the chemokine receptor antagonist class of molecules. Use the above information to create a molecule.
user
NC(=O)c1ccccc1.O=C(O)CNNC(=O)N1CCN(Cc2ccc(Cl)cc2)CC1
assistant