You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: It belongs to the tachykinin receptor antagonist class of molecules.
user
O=C(Cc1cc(C(F)(F)F)cc(C(F)(F)F)c1)C1CC(CCN2CCC(N3CCCCC3)CC2)(c2ccc(Cl)c(Cl)c2)CCCN1
assistant