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 receptor antagonist.
user
CC(=O)C1(c2ccccc2)CCN(CCCC2CC(c3ccc(Cl)c(Cl)c3)CN(C(=O)c3ccccc3)C2)CC1
assistant