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 anti tussive.
user
C=CCN1CCC2(c3cccc(O)c3)CC(N(CC(C)C)C(=O)c3ccccc3)CC(OC(C)=O)C2C1
assistant