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 anti tussive.
user
C=CCN1CCC2(c3cccc(OC)c3)CC(NC(=O)C=Cc3cccc(OC)c3)CCC2(OC(C)=O)C1
assistant