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 tachykinin receptor antagonist class of molecules. Use the above information to create a molecule.
user
CC(=O)N1CCC(C(=O)N2CCC(N(C)C(=O)c3ccc(C)cc3)C(c3ccc(Cl)c(Cl)c3)C2)CC1
assistant