You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: It belongs to the beta2 agonist class of molecules. Please represent the molecule in SMILES.
user
O=C(CCNCCc1ccc(F)c(F)c1)NCCNCCc1ccc(O)c2[nH]c(=O)ccc12
assistant