You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: It belongs to the tachykinin receptor antagonist class of molecules.
user
CC(=O)N1CCC(C(=O)N2CCC(N(C)C(=O)C(C)(C)c3cc(C(F)(F)F)cc(C(F)(F)F)c3)C(c3ccc(F)cc3F)C2)CC1
assistant