You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: The molecule is a muscarinic antagonist and belongs to the beta2 agonist class of molecules.
user
O=C(CCc1ccc(OCc2ccc(CNCC(O)c3ccc(O)c4[nH]c(=O)ccc34)cc2)cc1)N1CCC(C(=O)O)(c2ccccc2)CC1
assistant