You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: The molecule is a tachykinin antagonist.
user
CC(OC1(C2=C(C(O)CCO)C=COC2)C=CCCC1)c1cc(C(F)(F)F)cc(C(F)(F)F)c1
assistant