You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a muscarinic receptor antagonist. Please write the SMILES representation of it.
user
CCC(c1cccc(N(C(C)C)C(C)C)c1)c1cc(C=O)ccc1C=C(C)C(=O)O
assistant