You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: It belongs to the tachykinin antagonist class of molecules.
user
NC1(C(=O)NC(Cc2ccccc2)C(=O)NCC2CCN(CC3OCCCO3)CC2)CCCC1
assistant