You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: It belongs to the muscarinic receptor antagonist class of molecules.
user
CC(C)(C)C(c1ccccc1)N(C(=O)O)C1C2CN(C(=O)C(O)(c3ccccc3)C3CCCC3)CC21
assistant