You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Can you create a molecule that matches the given characteristics? The molecule is a tachykinin receptor antagonist.
user
O=C1CCC(C(=O)N2CCN(CCc3ccccc3)C(=O)C2Cc2c[nH]c3ccccc23)N1
assistant