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: It belongs to both the muscarinic antagonist and beta2 agonist classes of molecules. Please write the SMILES representation of it.
user
O=C1c2ccccc2C(=O)N1CCc1ccc(CCN2CCC(Cn3cnc(C(O)(c4ccccc4)C4CCCCC4)n3)CC2)cc1
assistant