You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): It belongs to the tachykinin receptor antagonist class of molecules.
user
Cn1c(NC(=O)NCc2ccccc2)c(-c2ccc(F)cc2)c2ccccc2c1=O
assistant