You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): It belongs to the anti tussive class of molecules.
user
COc1cc(O)c2c3c1OC1C(N(CC(C)C)C(=O)C=Cc4cc(Br)cs4)CCC4C(C2)N(C)CCC341
assistant