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
CCOC(=O)C1(C(O)CO[Si](C)(C)C(C)(C)C)CCN(C(=O)OCc2ccccc2)CC1
assistant