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 both the asthma treatment and crth2 antagonist classes of molecules.
user
COc1cc2c(CC(=O)O)c(C)n(Cc3ccc(C(F)F)s3)c2cc1F
assistant