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(C)(C)OC(=O)N1CCCCCCCC2(CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC2)OCC(c2cc(C(F)(F)F)c[nH]c2=O)CCC1c1ccccc1
assistant