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: The molecule is a anti tussive.
user
COc1c(C)c(C)c2c(c1C)CCC(C)(CCN1CCN(CCO)CC1)O2
assistant