You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: The molecule is a anti tussive.
user
COc1ccc2c(c1)C13CCNC(C2)C1(O)CC(C)(C)OC3.O=C(O)C=CC(=O)O
assistant