You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: The molecule is a asthma treatment and belongs to the crth2 antagonist class of molecules.
user
CCOC(=O)Cn1ncc2c1CCCC2N(C)S(=O)(=O)c1cnc(Oc2ccc(F)cc2OC)c(Br)c1
assistant